Store generated schema as raw datomic schema in EDN

[mgrbyte]

This will remove a level of abstraction that isn't really necessary.
The idea is to consolidate the notion of schema in pseudoace, in both code and
data terms.

• I propose the following changes:

  • Drop the dependency on the datomic-schema package.
    This is the lib that produces the format of the files currently stored in /generated-schemas
    It provides a level of abstraction that isn't necessary, and seems to hide/distract from the :pace meta-schema. The package also has some issues, which whilst not insurmountable, would need to keep up with changes in datomic itself - i think it's better to just to go with the raw schema.

• In the existing namespaces:
  pseudoace.schemata
  - Make all the schemas def'd here into EDN files
  - Keep the install function (as the logic is required), but change to read EDN files.
  pseudoace.schema-datomic (remove)
  - Move all functions here to psuedoace.schemata, rework to not use datomic-schema

• Re-format all existing schema in /generated-schemas

• Move /generated-schemas to resourcecs/schema, and just store the one version (current) of the schema. historical schema versions with git diff. (tentative this last one)

Once all this is done, then there will be no need for resolve-xref-info function that I've previously provided, as the information will then be able to be directly inferred from the schema.

[mgrbyte]

Agreement that this is a good way to go will mean I can close #55 and delete the schema-xref-support branch which has been languishing.

It means not having to code around the problem (which isn't really a problem once we remove the abstraction!)

[adamjohnwright]

I agree with these changes.

[mgrbyte]

here's an example of what I mean by a "raw" datomic schema.

[adamjohnwright]

I think that is much more readable and extendable than the current schema format

[azurebrd]

I imagine it would make more sense if I saw the raw version of the WS datomic schema, but it sounds good. To make sure I understand, are we talking about changing the schema257.edn format into a fuller format with more information ? I imagine that depending on how much Caltech (and other) curators want to be involved in the modeling of their datatypes, they'd want access to something relatively understandable, but as it is, I don't think they find the current .edn understandable, and we'd keep this format anyway in resourcecs/schema [sic ?] There hasn't been much talk on how modeling will work, but this sounds like it may be downstream of that.

[sibyl229]

@mgrbyte +1 for having the :pace meta-schema in the generated schema. It's very helpful

[mgrbyte]

@sibyl229 @a8wright @azurebrd Here's an example of what the schema will end up looking like.

pseudoace-issue-65-example.zip

Notes

• :pace/xref is included as meta-data
  • because :db/valueType :db/ref attributes and their corresponding xrefs cannot be transacted at once (needs two passes, hence the fixups)
• There may well be other :pace related attributes in this example that would need to be changed to meta data and processed in a 2nd phase transaction (anything that corresponds with the defs named *-fixups in schemata.clj.
• Does not define partitions currently.
  This can be no other way** with the raw schema, since this is the exact representation of the schema that is transacted to datomic.

Questions

• Does this schema as attached provide enough information to work out corresponding types of references?
• Is there anything about this example schema that's not understood?
  (should be quote close to what we end up with)

Formatting of the EDN file could be improved.

** potentially change markup in the EDN using some other reader tag than meta if desired.

[sibyl229]

@mgrbyte this doesn't change how schema is stored in Datomic once its loaded right?

I like the new format! Flat and easy to parse. Also, I think as long as :pace/use-ns and :pace/obj-ref show up with the attribute, it's great 👍

[mgrbyte]

@sibyl229 Yes, we have to preserve how the schema is stored in Datomic 1-to-1 with how it is now, proposal won't change that; and accordingly :pace/use-ns, :pace/obj-ref (and all other :pace* schema items will remain as it is today in the db.

This proposal only affects:

• how the schema is worked with from a developers view
• ACeDB reliance (eventually this will enable us to modify the EDN directly without need to parse ACe models)
• code complexity