df.world-data.xml

<data-definition>
    <struct-type type-name='world_site_unk130'>
        <int32_t name="index"/>

        <static-array name='unk_4' count='4'>
            <stl-vector>
                <pointer>
                    <int32_t name="unk_0"/>
                    <int32_t name="index"/>
                    <int32_t name="unk_8"/>
                    <stl-vector name="unk_c">
                        <int32_t/>
                    </stl-vector>
                </pointer>
            </stl-vector>
        </static-array>
    </struct-type>

    <enum-type base-type='int8_t' type-name="world_population_type">
        <enum-item name='Animal'/>
        <enum-item name='Vermin'/>
        <enum-item name='Unk2'/>
        <enum-item name='VerminInnumerable'/>
        <enum-item name='ColonyInsect'/>
        <enum-item name='Tree'/>
        <enum-item name='Grass'/>
        <enum-item name='Bush'/>
    </enum-type>

    <struct-type type-name='embark_note'>
        <int8_t name='tile'/>
        <int16_t name='fg_color'/>
        <int16_t name='bg_color'/>
        <stl-string name='name'/>
        <compound name='pos' type-name='coord2d'/>
        <int16_t name='left'/>
        <int16_t name='right'/>
        <int16_t name='top'/>
        <int16_t name='bottom'/>
    </struct-type>

    <struct-type type-name='world_population_ref'>
        <int16_t name="region_x"/>
        <int16_t name="region_y"/>
        <int16_t name="feature_idx" init-value="-1"/>

        <int32_t name='cave_id' ref-target='world_underground_region'/>

        <int32_t name="unk_28" />

        <int32_t name="population_idx">
            <code-helper name='refers-to'>
                (let* ((info $$._global)
                       (wdata $global.world.world_data)
                       (x $info.region_x)
                       (y $info.region_y)
                       (reg (or (when (/= $info.feature_idx -1)
                                  (let* ((rip $wdata.feature_map[(floor x 16)][(floor y 16)])
                                         (flst $rip.features.feature_init[(logand x 15)][(logand y 15)]))
                                    $flst[$info.feature_idx].feature))
                                (awhen $info.cave_id.ref-target
                                  $it.feature_init.feature)
                                (find-instance $world_region ;
                                               $wdata.region_map[x][y].region_id))))
                  $reg.population[$])
            </code-helper>
        </int32_t>

        <enum base-type='int16_t' name='depth' type-name='layer_type' comment="Doesn't look correct. See -1, 0, 41, 172, 508, and 686 with critters visible in all caverns. Some dead, but the dorf on the surface isn't"/>
    </struct-type>

    <struct-type type-name='local_population'>
        <enum base-type='int8_t' name='type' type-name='world_population_type'/>

        <compound is-union='true'>
            <int16_t name="race" ref-target='creature_raw'/>
            <int16_t name="plant" ref-target='plant_raw'/>
        </compound>

        <int32_t name="quantity"/>
        <int32_t name="quantity2" since='v0.40.01'/>

        <bitfield name='flags' base-type='uint8_t'>
            <flag-bit name='discovered'/>
            <flag-bit name='extinct' comment='guessed, based on 23a'/>
            <flag-bit name='already_removed' comment='no longer in world.populations'/>
            <flag-bit name='unk3' comment='prevents it from showing up, related to world.unk_59dc4 (now area_grasses?)'/>
        </bitfield>

        <compound name='population' type-name='world_population_ref'/>

        <int32_t name='wp_unk_10' init-value='-1'/>
        <int32_t name='wp_unk_18' init-value='-1'/>
        <int32_t name='wp_unk_1c' init-value='-1' comment="only set on subset of animals (including vermin). None seen on fresh embark"/>
        <int32_t name='unk_v47_1' init-value='-1' since='v0.47.01' comment="set on same animals as wp_unk_1c and only seen 0"/>
    </struct-type>


    <struct-type type-name='world_population'>
        <enum base-type='int8_t' name='type' type-name='world_population_type'/>

        <compound is-union='true'>
            <int16_t name="race" ref-target='creature_raw'/>
            <int16_t name="plant" ref-target='plant_raw'/>
        </compound>

        <int32_t name="count_min" init-value='10000001'/>
        <int32_t name="count_max" init-value='10000001'/>

        <int32_t name='unk_c' init-value='0' since='v0.40.01'/>

        <int32_t name="owner" ref-target='historical_entity'/>
        <int32_t name="unk_10" init-value='-1'/>
        <int32_t name="unk_14" init-value='-1'/>

        <int32_t name='unk_18' init-value='-1' since='v0.34.01'/>
        <int32_t name='unk_1c' init-value='-1' since='v0.34.01'/>
        <int32_t name='unk_20' init-value='-1' since='v0.47.01'/>
    </struct-type>

    <struct-type type-name='world_landmass'
                 instance-vector='$global.world.world_data.landmasses'>
        <compound name='name' type-name='language_name'/>
        <code-helper name='describe'>(describe-obj $.name)</code-helper>

        <int32_t name="index"/>
        <int32_t name="area"/>

        <int32_t name='min_x' since='v0.40.01'/>
        <int32_t name='max_x' since='v0.40.01'/>
        <int32_t name='min_y' since='v0.40.01'/>
        <int32_t name='max_y' since='v0.40.01'/>

        <stl-vector name='unk_74' type-name='int16_t'/>
        <stl-vector name='unk_84' type-name='int16_t'/>
    </struct-type>

    <enum-type type-name='world_region_type' base-type='int16_t'>
        <enum-item name='Swamp'/>
        <enum-item name='Desert'/>
        <enum-item name='Jungle'/>
        <enum-item name='Mountains'/>
        <enum-item name='Ocean'/>
        <enum-item name='Lake'/>
        <enum-item name='Glacier'/>
        <enum-item name='Tundra'/>
        <enum-item name='Steppe'/>
        <enum-item name='Hills' comment='Steppe and Hills share the same set of biomes, differing only in Drainage'/>
    </enum-type>

    <struct-type type-name='world_region' instance-vector='$global.world.world_data.regions'>
        <compound name='name' type-name='language_name'/>
        <code-helper name='describe'>(describe-obj $.name)</code-helper>

        <int32_t name="index"/>

        <enum base-type='int16_t' name="type" type-name='world_region_type'/>

        <compound name='region_coords' type-name='coord2d_path'/>

        <int32_t name="size" comment='Number of tiles in the region'/>
        <int32_t name="unk_98"/>
        <int32_t name="unk_9c"/>
        <int32_t name="unk_a0"/>
        <int32_t name="unk_a4"/>

        <stl-vector name="population" pointer-type='world_population'/>

        <static-array name="biome_tile_counts" count="51" index-enum='biome_type'>
            <int32_t/>
        </static-array>
        <stl-vector name="tree_biomes">
            <enum base-type='int16_t' type-name='biome_type'/>
        </stl-vector>
        <stl-vector name="tree_tiles_1" index-refers-to='$$._global.tree_biomes[$].refers-to'>
            <int16_t ref-target='plant_raw' />
        </stl-vector>
        <stl-vector name="tree_tiles_2" index-refers-to='$$._global.tree_biomes[$].refers-to'>
            <int16_t ref-target='plant_raw' />
        </stl-vector>
        <stl-vector name="tree_tiles_good" index-refers-to='$$._global.tree_biomes[$].refers-to'>
            <int16_t ref-target='plant_raw' />
        </stl-vector>
        <stl-vector name="tree_tiles_evil" index-refers-to='$$._global.tree_biomes[$].refers-to'>
            <int16_t ref-target='plant_raw' />
        </stl-vector>
        <stl-vector name="tree_tiles_savage" index-refers-to='$$._global.tree_biomes[$].refers-to'>
            <int16_t ref-target='plant_raw' />
        </stl-vector>

        <int8_t name="dead_percentage" comment="% vegetation dead on embark. The number increases during world gen history, with the new ones always at 100%"/>
        <bool name="unk_1e5" comment="Probably optionally set only on good and evil regions during world gen. Number set increases during world gen history and can affect neutral."/>
        <bool name="unk_1e6" comment="Probably optionally set only on neutral regions"/>
        <bool name="reanimating" comment="Indicates that region interaction is reanimating"/>                
        <int32_t name="unk_1e8" init-value='-1' since='v0.47.01' comment="Number set increases during world gen history"/>       
        <bool name='evil'/>
        <bool name='good'/>  -- At most one of 'evil' and 'good' is set at a time by DF.
        <int16_t name='lake_surface' init-value='-30000'/>
        <stl-vector name="forces" type-name='int32_t' ref-target='historical_figure' comment="historical figure IDs of force deities associated with the region. Number set increases during civ placement"/>
        <int32_t name="unk_v47_2" init-value='0' comment="Number set increases during civ placement"/>
        <int32_t name="mid_x"/>
        <int32_t name="mid_y"/>
        <int32_t name="min_x"/>
        <int32_t name="max_x"/>
        <int32_t name="min_y"/>
        <int32_t name="max_y"/>
    </struct-type>

    <struct-type type-name='world_underground_region'
                 instance-vector='$global.world.world_data.underground_regions'>
        <enum base-type='int16_t' name="type">
            <enum-item name='Cavern'/>
            <enum-item name='MagmaSea'/>
            <enum-item name='Underworld'/>
        </enum>

        <compound name='name' type-name='language_name'/>
        <code-helper name='describe'>(describe-obj $.name)</code-helper>

        <int32_t name="index"/>

        <int16_t name="layer_depth" comment='0-2 caves, 3 magma sea, 4 hell'/>
        <int16_t name="layer_depth_p1a" comment='+1'/>
        <int16_t name="layer_depth_p1b"/>
        <int16_t name="water"/>                --  Based on worldgen parameter pair.
        <int16_t name="unk_7c"/>
        <int16_t name="openness_min"/>         --  These parameters correspond to
        <int16_t name="openness_max"/>         --  the similar world gen parameters.
        <int16_t name="passage_density_min"/>  --
        <int16_t name="passage_density_max"/>  --

        <compound name='region_coords' type-name='coord2d_path'/>
        <stl-vector name="region_min_z" type-name='int16_t'/>
        <stl-vector name="region_max_z" type-name='int16_t'/>

        <stl-vector name="unk_c8"/>
        <pointer name="feature_init" type-name='feature_init'/>
    </struct-type>

    <struct-type type-name='world_river'>
        <compound name='name' type-name='language_name'/>
        <code-helper name='describe'>(describe-obj $.name)</code-helper>

        <compound name='path' type-name='coord2d_path'/>
        <stl-vector name="flow" type-name='int32_t'/>
        <stl-vector name="exit_tile" type-name='int16_t'/>  --  0 - 15
        <stl-vector name="elevation" type-name='int16_t'/>

        <compound name='end_pos' type-name='coord2d'/>
        <df-flagarray name='flags'/>
        <comment>
            Additional river information:
            The flow element affects the width of the river and seems to follow the
            formula width = (flow / 40000 * 46) + 1, with a minimum width of 4 and
            a maximum width of 47. DF uses specific names for rivers with certain flows:
            - Stream:      less than 5000
            - Minor River  5000 - 9999
            - River        10000 - 19999
            - Major River: greather than 20000
            Brooks tend to have a flow of 0, but DF has divided the controlling information
            between this structure, the region map entry (below), and the feature map.
            Thus, the region map flag 'is_brook' controls whether a water course actually
            is a (potentially broad) brook or an open water course. Likewise, the 'has_river'
            flag is needed for DF to properly understand a water course should be present.
            The exit tile holds the information on which mid level tile the river should
            exit the region. Presumably the path controls which edge to apply this to.
            Note that the river up/down/left/right flags of the region map entry should
            align with the sides rivers enter/exit.
            The feature map has to have a river entry for the corresponding world tile
            for a river to be implemented properly. All this is done by DF, but needs
            to be known if hacking.
            The world region details (below) data on rivers are generated as the regions
            are generated.
            The elevation element affects the level of the river. If the river elevation
            is lower than the surrounding area DF tends to generate a valley around the
            river to allow it to reach the correct elevation.
        </comment>
    </struct-type>

    <enum-type type-name='geo_layer_type' base-type='int16_t'>
        <enum-attr name='flag' type-name='inorganic_flags' use-key-name='true'/>

        <enum-item name='SOIL'/>
        <enum-item name='SEDIMENTARY'/>
        <enum-item name='METAMORPHIC'/>
        <enum-item name='IGNEOUS_EXTRUSIVE'/>
        <enum-item name='IGNEOUS_INTRUSIVE'/>
        <enum-item name='SOIL_OCEAN'/>
        <enum-item name='SOIL_SAND'/>
        <enum-item name='SEDIMENTARY_OCEAN_SHALLOW'/>
        <enum-item name='SEDIMENTARY_OCEAN_DEEP'/>
    </enum-type>

    <struct-type type-name='world_geo_layer'>
        <enum base-type='int16_t' name="type" type-name='geo_layer_type'/>

        <int32_t name="mat_index" ref-target='inorganic_raw'/>

        <code-helper name='describe'>(describe-obj $.mat_index.ref-target)</code-helper>

        <stl-vector name="vein_mat" type-name='int32_t' ref-target='inorganic_raw'/>
        <stl-vector name="vein_nested_in" comment='Index of the other vein this one is nested in, or -1'>
            <int16_t refers-to='$$._global.vein_mat[$].ref-target'/>
        </stl-vector>
        <stl-vector name="vein_type">
            <enum base-type='int8_t' type-name='inclusion_type'/>
        </stl-vector>
        <stl-vector name="vein_unk_38" type-name='int8_t' comment='density??'/>

        <int16_t name="top_height" comment='negative'/>
        <int16_t name="bottom_height"/>
    </struct-type>

    <struct-type type-name='world_geo_biome' instance-vector='$global.world.world_data.geo_biomes'>
        <int16_t name='unk1'/>
        <int16_t name='index'/>

        <code-helper name='describe'>(fmt "~A geo_layers" $.layers.count)</code-helper>

        <stl-vector name="layers" pointer-type='world_geo_layer'/>
    </struct-type>

    <struct-type type-name='world_region_feature'>
        <int16_t name='feature_idx'>
            <code-helper name='refers-to'>
                (let* ((info $$._parent._parent._global)
                       (wdata $global.world.world_data)
                       (x $info.pos.x)
                       (y $info.pos.y))
                  (when (/= $ -1)
                    (let* ((rip $wdata.feature_map[(floor x 16)][(floor y 16)])
                           (flst $rip.features.feature_init[(logand x 15)][(logand y 15)]))
                      $flst[$])))
            </code-helper>
        </int16_t>
        <int32_t name="layer" ref-target='world_underground_region'/>
        <int32_t name="region_tile_idx">
            <code-helper name='describe'>
                (let ((l $$._parent.layer.ref-target))
                  (when l
                    (list (fmt "(~A,~A)-(~A:~A)"
                               $l.region_coords.x[$] $l.region_coords.y[$]
                               $l.region_min_z[$] $l.region_max_z[$]))))
            </code-helper>
        </int32_t>
        <int16_t name='min_z'/>
        <int16_t name='max_z'/>
        <static-array count='6' type-name='coord2d' name='unk_c'/>
        <int32_t name="unk_28"/>
        <uint32_t name="seed" comment='looks random'/>
        <df-flagarray name="unk_30"/>
        <static-array count='15' type-name='int16_t' name='unk_38'/>
        <enum name="top_layer_idx" type-name='layer_type' base-type='int16_t'
                    comment='topmost cave layer the feature reaches'/>
    </struct-type>

    <struct-type type-name='world_region_details'>
        <static-array count='17' name='biome'>
            <static-array type-name='int8_t' count='17'
                          comment='lower 4 bits: biome 1..9; |=0x30 if fort'/>
            <comment>biome field reference:
                789
                456
                123
                as directions, with 5 = own world tile, 1 = SW, 9 = NE, etc.</comment>
        </static-array>
        <static-array count='17' name='elevation'>
            <static-array type-name='int16_t' count='17'/>
        </static-array>

        <static-array count='16' name='seed' comment='looks random'>
            <static-array type-name='uint32_t' count='16'/>
        </static-array>

        <compound name='edges'>
            <comment>
                In order to determine how biomes cross embark tile edges,
                the rectangle framing an embark tile is split into 4 corners,
                and 4 straight edge segments, using ranges measured in tiles:

                +-/----/+
                |       /
                /   *   |
                /       /
                +-/-/---+

                After this, each corner and edge segment is assigned the biome
                of one of the adjoining 4 or 2 embark tiles, based on the values
                in these arrays. It may be necessary to access adjacent details
                objects to collect the full outline:

                c11 x11 | c21
                y11 *** | y21
                -------------
                c12 x12 | c22

                There are also certain rules forcing ocean/lake biomes to lose
                edges to mountains, and both of them to anything else, no matter
                what the original array value is. The actual biomes for tiles in
                the frame are semi-randomly interpolated from this edge spec.
            
                For some reason DF provides for all edges of all mid level tiles
                in a world tile, but not for the corners on the south and east
                edges: for these you have to go to the next world tile.
                This has some effect on the corners on the south and east edges of
                the world where there are no adjacent tiles to get the data from.
                There the rules are static: the biomes of corners are taken from
                the easternmost and southernmost of the two touching corners.
            
                The rules for corner determination when the biome_corner field has
                specified a biome that's specified to yield as per the above seems
                to be to first take the NW corner (0), then the NE (1) one, and
                then the SW (2) one. If the selected corner doesn't exist (because
                it's outside of the world) the same fallback corner selection is
                used, with the exception of a northern row selection of NW (0),
                where the home corner (3) is selected.
            </comment>
            <static-array count='16' name='split_x'
                          comment='splits for horizontal edges, x=min y=max'>
                <static-array type-name='coord2d' count='17'/>
            </static-array>
            <static-array count='17' name='split_y'
                          comment='splits for vertical edges, x=min y=max'>
                <static-array type-name='coord2d' count='16'/>
           </static-array>

            <static-array name='biome_corner' count='16'
                          comment='0=Reference is NW, 1=Reference is N, 2=Reference is W, 3=Reference is current tile'>
                <static-array type-name='int8_t' count='16'/>
                <comment>
                    All 4 corners touching get the same reference (which determines the biome),
                    i.e. SE corner of the tile to the NW, SW corner of the tile to the
                    N, NE corner of the tile to the W, and the NW corner of the current
                    tile, as directed by the biome_corner value.
                </comment>
            </static-array>
            <static-array name='biome_x' count='16' comment='0=Reference is N, 1=Reference is current tile (adopted by S edge to the N)'>
                <static-array type-name='int8_t' count='16'/>
            </static-array>
            <static-array name='biome_y' count='16' comment='0=Reference is W, 1=Reference is current tile (Adopted by E edge to the W)'>
                <static-array type-name='int8_t' count='16'/>
            </static-array>
        </compound>

        <code-helper name='describe'> (describe-obj $.pos) </code-helper>

        <compound name='pos' type-name='coord2d'/>
        <int16_t name='unk12e8'/>
        <int16_t/>
        <int16_t/>
        <int16_t/>
        <int16_t/>

        -- Rivers crossing embark tile edges
        <compound name='rivers_vertical'>
            <static-array name='x_min' count='16'>
                <static-array type-name='int16_t' count='17'/>
            </static-array>
            <static-array name='x_max' count='16'>
                <static-array type-name='int16_t' count='17'/>
            </static-array>
            <static-array name='active' count='16'>
                <static-array type-name='int8_t' count='17'/>
            </static-array>
            <static-array name='elevation' count='16'>
                <static-array type-name='int16_t' count='17'/>
            </static-array>
        </compound>

        <compound name='rivers_horizontal'>
            <static-array name='y_min' count='17'>
                <static-array type-name='int16_t' count='16'/>
            </static-array>
            <static-array name='y_max' count='17'>
                <static-array type-name='int16_t' count='16'/>
            </static-array>
            <static-array name='active' count='17'>
                <static-array type-name='int8_t' count='16'/>
            </static-array>
            <static-array name='elevation' count='17'>
                <static-array type-name='int16_t' count='16'/>
            </static-array>
        </compound>

        <static-array name='other_features' count='16'>
            <static-array count='16'>
                <bitfield name='flags' base-type='uint8_t'>
                    <flag-bit name='construction' comment="the MLTs of world_data.constructions.all"/>
                    <flag-bit name='minor_site_footprint' comment="MLTs with sites other than MountainHall, DarkFortress, ForestRetreat, Town"/>
                    <flag-bit name='river' comment="Only a very small subset (selection criteria unknown), but the MLTs marked match up with Rivers* tiles plus implicit River tiles interpolated from that"/>
                </bitfield>
            </static-array>
        </static-array>

        <static-array count='16' name='features'>
            <static-array count='16'>
                <stl-vector pointer-type='world_region_feature'/>
            </static-array>
        </static-array>

        <int16_t name='lava_stone' ref-target='inorganic_raw'/>

        <static-array count='1152' name='unk_12' type-name='int16_t' since='v0.40.01' comment="Might it be 256 * 9 int8_t, i.e. 1 per 16*16 block?. Never seen other than -1, though"/>

        <static-array count='16' name='elevation2'>
            <static-array type-name='int16_t' count='16'/>
        </static-array>

        <static-array type-name='int32_t' count='256' name='undef13'/>
    </struct-type>

    <enum-type type-name='region_map_entry_flags'>
        <enum-item name='has_river'/>
        <enum-item name='tile_variant'/>
        <enum-item/>
        <enum-item name='has_site'/>
        <enum-item/>
        <enum-item name='river_up'/>
        <enum-item name='river_down'/>
        <enum-item name='river_right'/>

        <enum-item name='river_left'/>
        <enum-item name='discovered'/>
        <enum-item/>
        <enum-item/>
        <enum-item name='has_army'/>
        <enum-item name='is_peak'/>
        <enum-item name='is_lake'/>
        <enum-item name='is_brook'/>

        <enum-item name='has_road'/>
        <enum-item/>
        <enum-item/>
        <enum-item/>
        <enum-item/>
        <enum-item/>
        <enum-item/>
        <enum-item/>
    </enum-type>

    <enum-type type-name='front_type' base-type='uint16_t'>
        <enum-item name='front_none'/>
        <enum-item name='front_warm'/>
        <enum-item name='front_cold'/>
        <enum-item name='front_occluded'/>
    </enum-type>

    <enum-type type-name='cumulus_type' base-type='uint16_t'>
        <enum-item name='cumulus_none'/>
        <enum-item name='cumulus_medium'/>
        <enum-item name='cumulus_multi'/>
        <enum-item name='cumulus_nimbus'/>
    </enum-type>

    <enum-type type-name='stratus_type' base-type='uint16_t'>
        <enum-item name='stratus_none'/>
        <enum-item name='stratus_alto'/>
        <enum-item name='stratus_proper'/>
        <enum-item name='stratus_nimbus'/>
    </enum-type>

    <enum-type type-name='fog_type' base-type='uint16_t'>
        <enum-item name='fog_none'/>
        <enum-item name='fog_mist'/>
        <enum-item name='fog_normal'/>
        <enum-item name='fog_thick'/>
    </enum-type>

    <struct-type type-name='region_map_entry'>
        <int32_t name="unk_0"/>
        <int32_t name="finder_rank" init-value='-1'/>
        <stl-vector name="sites" pointer-type='world_site'/>
        <df-flagarray name='flags' index-enum='region_map_entry_flags'/>
        <int16_t name="elevation" comment='0-99=Ocean, 150+=Mountains, 100-149: all other biomes. Note that PSV elevation uses 100-299 for normal biomes, with range later cut to 1/4, and Mountains shifted down'/>
        <int16_t name="rainfall" comment='0-100'/>
        <int16_t name="vegetation" comment='0-100'/>
        <int16_t name="temperature" comment="Urists. 10000 Urists=0 Celsius. Urist steps equals Fahrenheit steps, which is equal to 5/9 Celsius steps"/>
        <int16_t name="evilness" comment='0-32=Good, 33-65=Neutral, 66-100=Evil'/>
        <int16_t name="drainage" comment='0-100'/>
        <int16_t name="volcanism" comment='0-100'/>
        <int16_t name="savagery" comment='0-32=Calm, 33-65=Neutral, 66-100=Savage'/>
        <int16_t name="air_temp"/>
        <int16_t name="air_x" comment='Toady: a velocity component?  I dont remember'/>
        <int16_t name="air_y" />
        <bitfield name='clouds' base-type='uint16_t'>
            <flag-bit name='front' count='2' type-name='front_type'/>
            <flag-bit name='cumulus' count='2' type-name='cumulus_type'/>
            <flag-bit name='cirrus' count='1'/>
            <flag-bit name='stratus' count='2' type-name='stratus_type'/>
            <flag-bit name='fog' count='2' type-name='fog_type'/>
            <flag-bit name='countdown' count='4' comment='A counter for stratus clouds that randomly decreases by 1 or 0 each timer weather is checked there. it does various stratus/fog effects based on the humidity/breezes/etc.'/>
        </bitfield>
        <bitfield name='wind' base-type='uint16_t' comment='blows toward direction in morning'>
            <flag-bit name='north_1'/>
            <flag-bit name='south_1'/>
            <flag-bit name='east_1'/>
            <flag-bit name='west_1'/>
            <flag-bit name='north_2'/>
            <flag-bit name='south_2'/>
            <flag-bit name='east_2'/>
            <flag-bit name='west_2'/>
        </bitfield>
        <int16_t name="snowfall" comment='0-5000, humidity?'/>
        <int16_t name="salinity" comment='0-100'/>
        <compound name='unk_3e' type-name='coord'/>
        <compound name='unk_44' type-name='coord'/>
        <compound name='unk_4a' type-name='coord'/>
        <int32_t name="region_id" ref-target='world_region'/>
        <int32_t name="landmass_id" ref-target='world_landmass'/>
        <int16_t name='geo_index' ref-target='world_geo_biome'/>
    </struct-type>

    <struct-type type-name='entity_claim_mask'>
        <pointer name="map" is-array='true'>
            <pointer is-array='true'>
                <stl-vector name='entities' type-name='int32_t' ref-target='historical_entity'/>
                <stl-vector name='region_masks'>
                    <pointer>
                        <static-array count='16'>
                            <static-array count='16' type-name='uint8_t'
                                            comment='1 bit per entity'/>
                        </static-array>
                    </pointer>
                </stl-vector>
            </pointer>
        </pointer>
        <int16_t name="width"/>
        <int16_t name="height"/>
    </struct-type>

    <struct-type type-name='moving_party'>
        <compound name='pos' type-name='coord2d' comment='global block x/y'/>
        <int16_t name="unk_4"/>
        <int32_t name="unk_c"/>
        <int32_t name="unk_10"/>
        <stl-vector name="members">
            <pointer>
                <int32_t name="nemesis_id" ref-target='nemesis_record'/>
                <int32_t name="hunger"/>
                <int32_t name="thirst"/>
                <int32_t name="sleepiness"/>
                <int32_t name="stored_fat"/>
                <int32_t name="unk_14"/>
                <int32_t name="unk_18" init-value='1' comment='maybe type'/>
                <int32_t name="unk_1c" init-value='-1000000'/>
                <int32_t name="unk_20" init-value='-1000000'/>
                <int32_t name="unk_24" init-value='-1000000'/>
            </pointer>
        </stl-vector>
        <int32_t name="entity_id" ref-target='historical_entity'/>
        <df-flagarray name='flags'/>
        <stl-vector name="unk_30"/>
        <stl-vector name="unk_40"/>
        <int16_t name="unk_70"/>
        <int16_t name="unk_72" init-value='-1'/>
        <int16_t name="unk_74" init-value='-1'/>
        <int32_t name="unk_7c" init-value='-1'/>
        <int32_t name="region_id" ref-target='world_region'/>
        <int32_t name="beast_id" init-value='-1' comment='for FB'/>
    </struct-type>

    <struct-type type-name='world_object_data'
                 instance-vector='$global.world.world_data.object_data' key-field='id'>
        <int32_t name='id' comment="World MLT of the data according to: i + x * 16 + k * 16 * world_width + y * 256 * world_width, where (x, y) is the world tile and (i, k) the MLT within it"/>
        <stl-vector name="altered_items" type-name='int32_t' comment='world_data_subid'/>
        <stl-vector name="offloaded_items">
            <pointer>
                <pointer name="item" type-name="item"/>
                <int32_t name="global_x" comment='in tiles it seems'/>
                <int32_t name="global_y"/>
                <int32_t name="global_z"/>
                <int32_t name="container" ref-target='item'/>
                <int32_t name="building" ref-target='building'/>
                <int32_t name="unk_18"/>
            </pointer>
        </stl-vector>
        <stl-vector name="unk_24"/>
        <stl-vector name="unk_34"/>
        <stl-vector name="unk_44"/>
        <stl-vector name="unk_54"/>
        <stl-vector name="unk_64"/>
        <stl-vector name="altered_buildings" type-name='int32_t' comment='world_data_subid'/>
        <stl-vector name="offloaded_buildings">
            <pointer>
                <pointer name="building" type-name="building"/>
                <int32_t name="global_x" comment='in tiles it seems'/>
                <int32_t name="global_y"/>
                <int32_t name="global_z"/>
                <int32_t name="unk_10"/>
            </pointer>
        </stl-vector>
        <stl-vector name="unk_94">
            <pointer>
                <int32_t name="global_x" comment='in in-game tiles it seems'/>
                <int32_t name="global_y"/>
                <int32_t name="global_z"/>
                <int32_t name="unk_c"/>
            </pointer>
        </stl-vector>
        <stl-vector name='creation_zone_alterations' pointer-type='creation_zone_pwg_alterationst' since='v0.40.01'/>
        <int32_t name='unk_v40_1' since='v0.40.01'/>
        <int32_t name="year"/>
        <int32_t name="year_tick"/>

        <compound name='picked_growths' since='v0.40.14' comment="also includes 'automatically picked' i.e. fallen fruit that becomes item_spatter. Doesn not seem to be used by Adventurer mode">
            <stl-vector name='x' type-name='int16_t' comment="0 - 47, within the MLT"/>
            <stl-vector name='y' type-name='int16_t' comment="0 - 47, within the MLT"/>
            <stl-vector name='z' type-name='int16_t' comment="z coordinate using the elevation coordinate system"/>
            <stl-vector name='subtype' type-name='int32_t' comment="subtype of the growth picked within the raws of the implicit plant"/>
            <stl-vector name='density' type-name='int32_t' comment="copy of the density field of the growth raws"/>
            <stl-vector name='year' type-name='int32_t' comment="presumably to know whether it's the current year's harvest or the previous one's"/>
        </compound>

        <compound name='unk_v43' since='v0.43.01' comment="probably used by Adventurer mode">
            <stl-vector name='x' type-name='int16_t' comment="probably MLT relative x coordinate"/>
            <stl-vector name='y' type-name='int16_t' comment="probably MLT relative y coordinate"/>
            <stl-vector name='z' type-name='int16_t' comment="probably z coordinate using the elevation coordinate system"/>
            <stl-vector name='unk_4' type-name='int32_t' comment="233/234 seen"/>
        </compound>
    </struct-type>

    <enum-type type-name='mountain_peak_flags'>
        <enum-item name='is_volcano'/>
    </enum-type>

    <struct-type type-name='world_data'>
        <compound name='name' type-name='language_name' comment='name of the world'/>

        <static-array name='unk1' count='15' type-name='int8_t'/>

        <int32_t name='next_site_id'/>
        <int32_t name='next_site_unk130_id'/>
        <int32_t name='next_resource_allotment_id'/>
        <int32_t name='next_breed_id'/>

        <int32_t name='next_battlefield_id' since='v0.34.01'/>
        <int32_t name='unk_v34_1' since='v0.34.01'/>

        <int32_t name='world_width'/>
        <int32_t name='world_height'/>
<!--
        <stl-vector name='travel' pointer-type='moving_party'/>
-->
        <int32_t name='unk_78'/>
        <int32_t name='moon_phase'/>
        <enum name='flip_latitude' base-type='int16_t'>
            <enum-item name='None' value='-1'/>
            <enum-item name='North'/>
            <enum-item name='South'/>
            <enum-item name='Both'/>
        </enum>
        <int16_t name='flip_longitude'/>
        <int16_t name='unk_84'/>
        <int16_t name='unk_86'/>
        <int16_t name='unk_88'/>
        <int16_t name='unk_8a'/>

        <int16_t name='unk_v34_2' since='v0.34.01'/>
        <int16_t name='unk_v34_3' since='v0.34.01'/>

        <compound name='unk_b4'>
            <int32_t name='world_width2'/>
            <int32_t name='world_height2'/>

            <pointer type-name='uint32_t' is-array='true' comment='align(width,4)*height'/>
            <pointer type-name='uint32_t' is-array='true' comment='align(width,4)*height'/>
            <pointer type-name='uint32_t' is-array='true' comment='width*height'/>
            <pointer type-name='uint8_t' is-array='true' comment='align(width,4)*height'/>
        </compound>

        <stl-vector name='region_details' pointer-type='world_region_details'/>

        <int32_t name="adv_region_x"/>
        <int32_t name="adv_region_y"/>
        <int32_t name="adv_emb_x"/>
        <int32_t name="adv_emb_y"/>

        <int16_t name="unk_x1"/>
        <int16_t name="unk_y1"/>
        <int16_t name="unk_x2"/>
        <int16_t name="unk_y2"/>

        <compound name='constructions'>
            <int16_t name="width"/>
            <int16_t name="height"/>

            <pointer name="map" is-array='true'>
                <pointer is-array='true'>
                    <stl-vector pointer-type='world_construction_square'/>
                </pointer>
            </pointer>

            <stl-vector name="list" pointer-type='world_construction'/>
            <int32_t name="next_id"/>
        </compound>

        <compound name="entity_claims1" type-name='entity_claim_mask'/>
        <compound name="entity_claims2" type-name='entity_claim_mask'/>

        <stl-vector name="sites" pointer-type='world_site'/>

        <stl-vector name="site_unk130" pointer-type='world_site_unk130'/>

        <stl-vector name="resource_allotments" pointer-type='resource_allotment_data'/>

        <stl-vector name='breeds' pointer-type='breed' />
        <stl-vector name='battlefields' pointer-type='battlefield' since='v0.34.01' />
        <stl-vector name='region_weather' pointer-type='region_weather' since='v0.34.01'/>

        <stl-vector name='object_data' pointer-type='world_object_data' since='v0.34.01'/>

        <stl-vector name="landmasses" pointer-type='world_landmass'/>
        <stl-vector name="regions" pointer-type='world_region'/>
        <stl-vector name="underground_regions" pointer-type='world_underground_region'/>
        <stl-vector name="geo_biomes" pointer-type='world_geo_biome'/>
        <stl-vector name="mountain_peaks">
            <pointer>
                <compound name='name' type-name='language_name'/>
                <compound name='pos' type-name='coord2d'/>
                <df-flagarray name='flags' index-enum='mountain_peak_flags'/>
                <int16_t name="height"/>
            </pointer>
        </stl-vector>
        <stl-vector name="rivers" pointer-type='world_river'/>

        <pointer name="region_map" is-array='true'>
            <pointer is-array='true' type-name='region_map_entry'/>
        </pointer>
        <pointer name="unk_1c4" type-name='int8_t' is-array='true'/> 2d byte array with size based on map size
        <padding name="unk_1c8" size="4"/>

        <stl-vector name="embark_notes" pointer-type='embark_note'/>

        <pointer name="unk_1dc" is-array='true'>
            <pointer is-array='true'>
                <stl-vector pointer-type='army'/>
            </pointer>
        </pointer>
        <pointer name="unk_1e0" is-array='true'>
            <pointer is-array='true'>
                <stl-vector/>
            </pointer>
        </pointer>
        <pointer name="unk_1e4" is-array='true'>
            <pointer is-array='true'>
                <stl-vector/>
            </pointer>
        </pointer>
        <pointer name="unk_1e8" is-array='true'>
            <pointer is-array='true'>
                <stl-vector/>
            </pointer>
        </pointer>
        <pointer name="unk_1ec" is-array='true'>
            <pointer is-array='true'>
                <stl-vector/>
            </pointer>
        </pointer>
        <pointer name="unk_1f0" is-array='true'>
            <pointer is-array='true'>
                <stl-vector/>
            </pointer>
        </pointer>

        <int32_t since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <pointer since='v0.40.01'/>
        <padding size='294920'/>
        <int8_t since='v0.40.01'/>
        <int8_t since='v0.40.01'/>

        <stl-vector name="active_site" pointer-type='world_site'/>

        <pointer name="feature_map" is-array='true'>
            <pointer is-array='true'>
                <int16_t name='x'/>
                <int16_t name='y'/>
                <pointer name='features'>
                    <static-array name='feature_init' count='16'>
                        <static-array count='16'>
                            <stl-vector pointer-type='feature_init'/>
                        </static-array>
                    </static-array>
                    <static-array name='unk' count='16'>
                        <static-array count='16'>
                            <static-array count='30' type-name='int32_t' comment='it might actually be [30][16][16] rather than [16][16][30]'/>
                        </static-array>
                    </static-array>
                </pointer>
                <pointer name='unk_8' type-name='int16_t' is-array='true'/>
                <pointer name='unk_c' type-name='int32_t' is-array='true'/>
            </pointer>
            <comment>
                Additional feature_map information:
                The feature_map is a two dimensional structure dividing the world into 16 * 16
                world tile "feature shells" (and remember that there's a single tile wide shell
                at the end of each dimension, so a pocket world has a shell dimension of 2 * 2).
                These shells are loaded and unloaded dynamically, which means trying to access a
                shell that isn't the one in DF's focus (where the fortress/adventurer/pre embark
                cursor is) is invalid and can lead to DF crashing.
                The "features.feature_init" 16 * 16 structure contains the features of each of
                the corresponding world tiles within the shell. However, DF only loads the
                feature vectors for the world tiles in focus, although they seem to remain
                loaded until the shell is unloaded. Until loaded the vectors have a size of 0.
                Manipulation of the features is usually preserved as feature vectors are
                unloaded/reloaded, so spires can be elongated and rivers added, but some
                details, such as river fauna, seem to be generated on loading. Added features
                may not necessarily be reloaded at the vector index they were created at.
            </comment>
        </pointer>

<!--
        <df-flagarray name='flags'/>
-->

        <stl-vector name="old_sites" type-name='int32_t' ref-target='world_site'/>
        <stl-vector name="old_site_x" type-name='int32_t'/>
        <stl-vector name="old_site_y" type-name='int32_t'/>

        <compound name='land_rgns' type-name='coord2d_path'/>

        <int32_t name="unk_260"/>
        <int8_t name="unk_264"/>
        <int32_t name="unk_268"/>
        <int8_t name="unk_26c"/>
        <int32_t name="unk_270"/>

        exists during worldgen only, before it finishes
        some sort of wandering groups (entity types NomadicGroup, PerformanceTroupe)
        unk_10, unk_24 and unk_region_name are either all initialised or all empty/uninitialised
        <stl-vector name="unk_274"> 
            <pointer>
                <stl-vector name="members" pointer-type="historical_figure"/>
                <stl-vector name="unk_10">
                    <pointer>
                        <int32_t name="unk_0"/> a type, maybe
                        <int32_t name='race' ref-target='creature_raw'/>
                        <int32_t name="unk_8"/> some flags I think
                    </pointer>
                </stl-vector>
                <pointer name="entity" type-name="historical_entity"/>
                <int32_t name="unk_24"/>
                <pointer name="unk_region_name" type-name="language_name"/>
                <int32_t name="unk_2c"/>
                <int32_t name="unk_30"/>
            </pointer>
        </stl-vector>

        <compound name='unk_482f8' since='v0.40.01'>
            <static-array type-name='int32_t' count='320000'/>
            <int32_t/>
            <int32_t/>
            <int32_t/>
            <int32_t/>
            <int32_t/>
            <int32_t/>
            <int32_t/>
        </compound>
    </struct-type>

    <struct-type type-name='breed' key-field='id' instance-vector='$global.world.world_data.breeds'>
        <int32_t name='id'/>
        <int32_t name="unk_4"/>
        <stl-vector name="unk_8">
            <pointer>
                <int32_t name='id'/>
                <int32_t name="unk_4"/>
                <int32_t name="unk_8"/>
            </pointer>
        </stl-vector>
        <stl-vector name="unk_18">
            <pointer>
                <int32_t name='id'/>
                <int32_t name="unk_4"/>
                <int32_t name="unk_8"/>
            </pointer>
        </stl-vector>
        <stl-vector name="unk_28">
            <pointer>
                <int32_t name="unk_0"/>
                <int32_t name="unk_4"/>
            </pointer>
        </stl-vector>
    </struct-type>

    <struct-type type-name='battlefield' key-field='id' instance-vector='$global.world.world_data.battlefields'>
        <int32_t name='id'/>
        <stl-vector name='sapient_deaths' comment="Seems to be by squad. Trolls/Blizzard Men not counted">
            <pointer>
                <int32_t name='deaths' comment="May not sum up, at least not for defenders"/>
                <int32_t name='race'/>
                <int32_t name='squad' init-value='-1' comment="A guess (Don't know how to find squads). Animal people seem to have -1"/>
                <int32_t name="unk_c" init-value='-1'/>
                <int32_t name='start_year'/>
                <int32_t name='end_year'/>
                <int32_t name="unk_18" comment="0, 1, 4, 5, 7 seen"/>
                <int32_t name="unk_1c" since='v0.40.01' comment="2-5 seen. 4-5 probably attacker, 2-3 probably defender"/>
            </pointer>
        </stl-vector>
        <stl-vector name='hfs_killed' type-name='int32_t' ref-target='historical_figure' comment="some victims are not listed, for some reason, and culled HFs can be present"/>
        <int32_t name="x1"/>
        <int32_t name="y1"/>
        <int32_t name="x2"/>
        <int32_t name="y2"/>
        <int32_t name="unk_34" init-value='-1' comment="wouldn't be surprised if it was layer, based on other structure layouts, but no non -1 found"/>
        <stl-vector name='event_collections' type-name="int32_t" ref-target='history_event_collection'/>
    </struct-type>

    <enum-type type-name='region_weather_type' base-type='int32_t'>
        <enum-item name='CreepingGas'/>
        <enum-item name='CreepingVapor' comment="doesn't seem to be generated by DF, but appears if hacked"/>
        <enum-item name='CreepingDust'/>
        <enum-item name='FallingMaterial' comment="a.k.a. rain, both blood and syndrome, but not regular"/>
    </enum-type>
    
    <struct-type type-name='region_weather' key-field='id' instance-vector='$global.world.world_data.region_weather' comment="only evil weather, not the regular kind">
        <int32_t name='id'/>
        <enum name='type' type-name='region_weather_type' base-type='int32_t' comment="Creeping Gas/Vapor/Dust='cloud' below, FallingMaterial='rain'"/>
        <int16_t name='mat_type' ref-target='material' aux-value='$$.mat_index'/>
        <int32_t name='mat_index'/>
        <bool name='announcement' comment="Guess based on seeing it appear for an entry when hitting the embark, resulting in an announcement"/>
        <int32_t name='region_x' comment="world tile, used with evil rain. Probably uninitialized with cloud"/>
        <int32_t name='region_y' comment="world tile, used with evil rain. Probably uninitialized with cloud"/>
        <int32_t name='world_in_game_x' init-value='-30000' comment="used with evil clouds, indicating global in-game coordinates"/>
        <int32_t name='world_in_game_y' init-value='-30000' comment="used with evil clouds, indicating global in-game coordinates"/>
        <int32_t name='world_in_game_z' init-value='-30000' comment="probably never used, as weather appears on the surface"/>
        <int32_t name='cloud_x_movement' comment="-1/0/1, indicating the movement per 10 ticks in X direction. Uninitialized for rain"/>
        <int32_t name='cloud_y_movement' comment="-1/0/1, indicating the movement per 10 ticks in Y direction. Uninitialized for rain"/>
        <int32_t name='remaining_duration' comment="ticks down 1 every 10 ticks. Removed some time after reaching 0. Cloud duration seems to start with a fairly large, but somewhat random value"/>
        <int32_t name='region_id' ref-target='world_region' comment="Set for clouds, -1 for rain"/>
    </struct-type>
</data-definition>

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