diff --git a/DASH-MPD.xsd b/DASH-MPD.xsd
index be7a593..8f1af03 100644
--- a/DASH-MPD.xsd
+++ b/DASH-MPD.xsd
@@ -107,6 +107,7 @@
       <xs:element name="SupplementalProperty" type="DescriptorType" minOccurs="0" maxOccurs="unbounded"/>
       <xs:element name="UTCTiming" type="DescriptorType" minOccurs="0" maxOccurs="unbounded"/>
       <xs:element name="LeapSecondInformation" type="LeapSecondInformationType" minOccurs="0"/>
+      <xs:element name="ContentSteering" type="ContentSteeringType" minOccurs="0" maxOccurs="unbounded"/>
       <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
     </xs:sequence>
     <xs:attribute name="id" type="xs:string"/>
@@ -185,6 +186,7 @@
     <xs:attribute name="start" type="xs:duration"/>
     <xs:attribute name="duration" type="xs:duration"/>
     <xs:attribute name="bitstreamSwitching" type="xs:boolean" default="false"/>
+    <xs:attribute name="minBufferTime" type="xs:duration"/>
     <xs:anyAttribute namespace="##other" processContents="lax"/>
   </xs:complexType>
   <xs:complexType name="ImportedMpdType">
@@ -1189,7 +1191,7 @@
       <xs:any namespace="##other" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
       <xs:element name="SupplementalProperty" type="DescriptorType" minOccurs="0" maxOccurs="unbounded"/>
     </xs:sequence>
-    <xs:attribute name="url" type="xs:anyURI" use="required"/>
+    <xs:attribute name="uri" type="xs:anyURI" use="required"/>
     <xs:attribute name="earliestResolutionTimeOffset" type="xs:double" default="60.0"/>
     <xs:attribute name="maxDuration" type="xs:unsignedLong" default="2251799813685247"/>
     <xs:attribute name="executeOnce" type="xs:boolean" default="false"/>
@@ -1205,7 +1207,7 @@
       <xs:extension base="AlternativeMPDEventType">
         <xs:attribute name="returnOffset" type="xs:unsignedLong"/>
         <xs:attribute name="clip" type="xs:boolean" default="true"/>
-        <xs:attribute name="startAtOffset" type="xs:boolean" default="false"/>
+        <xs:attribute name="startWithOffset" type="xs:boolean" default="false"/>
       </xs:extension>
     </xs:complexContent>
   </xs:complexType>
diff --git a/DASH.abnf b/DASH.abnf
new file mode 100644
index 0000000..9629c59
--- /dev/null
+++ b/DASH.abnf
@@ -0,0 +1,215 @@
+; =============================================================================
+; DASH-MPD-values.abnf
+;
+; Combined ABNF definitions for ISO/IEC 23009-1:2026 (DASH 6th Edition)
+; Companion file to DASH-MPD.xsd for automated MPD value validation.
+;
+; External rules referenced but defined elsewhere:
+;   host, port           - IETF RFC 3986 (as augmented by RFC 6874)
+;   http-URI, https-URI  - IETF RFC 9110 Section 4.2
+; =============================================================================
+
+
+; =============================================================================
+; 5.3.11.2 - Preselection Descriptor
+; Scheme: urn:mpeg:dash:preselection:2016
+; =============================================================================
+
+PRESELECTION-DESCRIPTOR-VALUE = TAG-VALUE "," ID-LIST
+
+ID-LIST       = ID-VALUE *( WHITESPACE ID-VALUE )
+
+TAG-VALUE     = STRING
+
+ID-VALUE      = 1*DIGIT
+
+WHITESPACE    = 1*WSP
+
+
+; =============================================================================
+; 5.8.5.2 - MP4 Protection
+; Scheme: urn:mpeg:dash:mp4protection:2011
+; =============================================================================
+
+MP4-PROTECTION-VALUE = VERSIONED-4CC
+
+VERSIONED-4CC = CCCC [ CCCC-VERSION ]
+
+CCCC          = ALPHA ALPHA ALPHA ALPHA
+
+CCCC-VERSION  = ":" 1*8HEXDIG
+
+
+; =============================================================================
+; 5.8.5.3 - CA_descriptor
+; Scheme: urn:mpeg:dash:13818:1:CA_descriptor:2011
+; =============================================================================
+
+CA-DESCRIPTOR-VALUE = LHEX LHEX LHEX LHEX
+
+LHEX          = DIGIT / "a" / "b" / "c" / "d" / "e" / "f"
+
+
+; =============================================================================
+; 5.8.5.4 - Frame Packing
+; Scheme: urn:mpeg:dash:14496:10:frame_packing_arrangement_type:2011
+;         urn:mpeg:dash:13818:1:stereo_video_format_type:2011
+; =============================================================================
+
+FRAME-PACKING-ARRANGEMENT-TYPE-VALUE = VIDEO-FRAME-PACKING-TYPE
+
+STEREO-VIDEO-FORMAT-TYPE = VIDEO-FRAME-PACKING-TYPE
+
+VIDEO-FRAME-PACKING-TYPE = 1*2DIGIT
+
+
+; =============================================================================
+; 5.8.5.6 - DASH Role Scheme
+; Scheme: urn:mpeg:dash:role:2011
+; =============================================================================
+
+ROLE-VALUE  = "caption" / "subtitle" / "main" / "alternate"
+            / "supplementary"
+ROLE-VALUE  =/ "commentary" / "dub" / "description" / "sign"
+            / "metadata"
+ROLE-VALUE  =/ "enhanced-audio-intelligibility" / "emergency"
+ROLE-VALUE  =/ "forced-subtitle" / "easyreader" / "karaoke"
+
+
+; =============================================================================
+; 5.8.5.7 - DASH Multiple Views Scheme (Stereo ID)
+; Scheme: urn:mpeg:dash:stereoid:2011
+; =============================================================================
+
+STEROID-VALUE = VIEW-INDICATOR *( SP VIEW-INDICATOR )
+VIEW-INDICATOR = ("l"/"r") 1*DIGIT
+
+
+; =============================================================================
+; 5.8.5.8 - DASH UTC Timing Schemes
+; =============================================================================
+
+; --- urn:mpeg:dash:utc:ntp:2014 / urn:mpeg:dash:utc:sntp:2014 ---
+
+NTP-VALUE   = TIME-SERVER *( WS TIME-SERVER )
+
+TIME-SERVER = host [ ":" port ]
+                ; host and port per IETF RFC 3986 / RFC 6874
+
+; --- urn:mpeg:dash:utc:http-head:2014
+;     urn:mpeg:dash:utc:http-xsdate:2014
+;     urn:mpeg:dash:utc:http-iso:2014
+;     urn:mpeg:dash:utc:http-ntp:2014 ---
+
+HTTP-VALUE  = httpurl *( WS httpurl )
+                ; httpurl = http-URI / https-URI per IETF RFC 9110
+
+; --- urn:mpeg:dash:utc:direct:2014 ---
+
+DIRECT-VALUE = [ "-" ] 4DIGIT "-" 2DIGIT "-" 2DIGIT
+               "T" 2DIGIT ":" 2DIGIT ":" 2DIGIT ["." 1*DIGIT] 
+               [ "Z" / ( "+" / "-" ) 2DIGIT ":" 2DIGIT ]
+
+
+; =============================================================================
+; 5.8.5.9 - Audio Receiver Mix
+; Scheme: urn:mpeg:dash:audio-receiver-mix:2014
+; =============================================================================
+
+AUDIO-RECEIVER-MIX-VALUE = ADAPTATION-SET-ID
+
+ADAPTATION-SET-ID = DECIMAL-DIGITS
+
+
+; =============================================================================
+; 5.8.5.10 - MPD Adaptation Set Linking
+; Scheme: urn:mpeg:dash:mpd-as-linking:2015
+; =============================================================================
+
+MPD-AS-LINKING-VALUE = MPD-URL [ WSP TIMELINE-OFFSET ]
+
+MPD-URL          = httpurl
+                     ; http-URI / https-URI per IETF RFC 9110
+
+TIMELINE-OFFSET  = "timeOffset=" [ "-" ] DECIMAL-DIGITS
+
+
+; =============================================================================
+; 5.8.5.11 - Sub-Asset Identifier
+; Scheme: urn:mpeg:dash:sai:2015
+; =============================================================================
+
+SAI-VALUE = *VCHAR
+
+
+; =============================================================================
+; 5.8.5.13 - Quality Ranking Equivalence
+; Scheme: urn:mpeg:dash:qr-equivalence:2018
+; =============================================================================
+
+QR-EQUIVALENCE-VALUE = AS-ID *( WSP AS-ID )
+
+AS-ID = DECIMAL-DIGITS
+
+
+; =============================================================================
+; 5.8.7 - Supplementary Video (VVC picture-in-picture)
+; SupVideoInfo@processingInfo value syntax
+; =============================================================================
+
+processingInfo       = dataUnitsReplaceable 1*( SP regionId )
+
+dataUnitsReplaceable = "0" / "1"
+
+regionId             = 1*DIGIT
+
+
+
+; =============================================================================
+; Annex H.2.3 - Static Spatial Relationship Description (SRD)
+; Scheme: urn:mpeg:dash:srd:2014
+; =============================================================================
+
+STATIC-SRD-VALUE = source-id "," object-x "," object-y ","
+                   object-width "," object-height
+                   [ "," total-width
+                     [ "," total-height
+                       [ "," spatial-set-id ] ] ]
+
+source-id       = DECIMAL-DIGITS
+spatial-set-id  = DECIMAL-DIGITS
+object-x        = DECIMAL-DIGITS
+object-y        = DECIMAL-DIGITS
+object-width    = DECIMAL-DIGITS
+object-height   = DECIMAL-DIGITS
+total-width     = DECIMAL-DIGITS
+total-height    = DECIMAL-DIGITS
+
+
+; =============================================================================
+; Annex H.2.4 - Dynamic Spatial Relationship Description (SRD)
+; Scheme: urn:mpeg:dash:srd:dynamic:2016
+; =============================================================================
+
+DYNAMIC-SRD-VALUE = source-id "," coordinate-id [ "," spatial-set-id ]
+
+coordinate-id   = STRING
+
+
+; =============================================================================
+; Shared terminal rules
+; =============================================================================
+
+DECIMAL-DIGITS = 1*DIGIT
+
+STRING         = *VCHAR
+
+; WS is used in the spec as an alias for whitespace between tokens
+WS             = 1*WSP
+
+; httpurl is a placeholder for http-URI / https-URI from RFC 9110
+; Parsers should accept both schemes.
+; httpurl = http-URI / https-URI    ; defined in IETF RFC 9110 sec. 4.2
+
+; HEXDIG is already defined in RFC 5234 core rules.
+; LHEX is the lowercase-only subset used by the CA_descriptor scheme.
diff --git a/example_G23.mpd b/example_G23.mpd
index c34f919..a8477ec 100644
--- a/example_G23.mpd
+++ b/example_G23.mpd
@@ -4,7 +4,7 @@
     <BaseURL>http://liveserver.com/live/live1/</BaseURL>
     <EventStream timescale="90000" schemeIdUri="urn:mpeg:dash:event:alternativeMPD:replace:2025">
       <Event presentationTime="0" duration="2838240000000000" id="42">
-        <ReplacePresentation url="http://cdn1.example.com/preroll.mpd" maxDuration="1350000" clip="false" executeOnce="true"/>
+        <ReplacePresentation uri="http://cdn1.example.com/preroll.mpd" maxDuration="1350000" clip="false" executeOnce="true"/>
       </Event>
     </EventStream>
     <AdaptationSet contentType="video" maxHeight="1920" maxWidth="1080" mimeType="video/mp4" par="16:9" segmentAlignment="true" startWithSAP="1">
diff --git a/example_G29-1.mpd b/example_G29-1.mpd
index 7b9cb96..c148e89 100644
--- a/example_G29-1.mpd
+++ b/example_G29-1.mpd
@@ -1,10 +1,10 @@
-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0" encoding="UTF-8"?> 
 <MPD xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:advanced-linear:2025" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" type="dynamic" minimumUpdatePeriod="PT2S" timeShiftBufferDepth="PT30M" minBufferTime="PT4S" availabilityStartTime="2023-12-25T12:30:00" publishTime="2023-12-25T12:30:00">
   <BaseURL>http://cdn1.example.com/</BaseURL>
   <Period id="1">
     <EventStream timescale="90000" schemeIdUri="urn:mpeg:dash:event:alternativeMPD:replace:2025">
       <Event presentationTime="3780000" duration="1350000" id="42">
-        <ReplacePresentation url="http://cdn1.example.com/ad1.mpd?dur=15" earliestResolutionTimeOffset="378000" maxDuration="1350000" clip="true" executeOnce="true" noJump="2"/>
+        <ReplacePresentation uri="http://cdn1.example.com/ad1.mpd?dur=15" earliestResolutionTimeOffset="378000" maxDuration="1350000" clip="true" executeOnce="true" noJump="2"/>
       </Event>
       <RequestParam includeInRequests="altmpd" queryTemplate="prta=$urn:mpeg:dash:state:execution-delta#42$"/>
     </EventStream>
diff --git a/xml2rtf.sh b/xml2rtf.sh
new file mode 100755
index 0000000..ad016f6
--- /dev/null
+++ b/xml2rtf.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Check if an input file is provided
+if [ -z "$1" ]; then
+  echo "Usage: ./xml2rtf.sh <input_file.xml>"
+  exit 1
+fi
+
+INPUT_FILE="$1"
+# Create an output filename (e.g., data.xml -> data.rtf)
+OUTPUT_FILE="${INPUT_FILE%.*}.rtf"
+
+# Check if 'highlight' is installed
+if ! command -v highlight &> /dev/null; then
+    echo "Error: 'highlight' is not installed."
+    echo "Please run: brew install highlight"
+    exit 1
+fi
+
+echo "Converting $INPUT_FILE to $OUTPUT_FILE..."
+
+# 1. xmllint --format: Indents and pretty-prints the XML
+# 2. highlight: Converts to RTF with B&W styling
+#    --syntax=xml: Tells the tool it is processing XML
+#    --out-format=rtf: Sets output to Rich Text
+#    --style=bw: Uses the built-in Black & White theme (Bold/Italic only)
+#    --font="Courier New": Sets a monospaced font
+#    --font-size=24: Sets font size (approx 12pt in RTF context)
+
+xmllint --format "$INPUT_FILE" | \
+highlight --syntax=xml \
+          --out-format=rtf \
+          --style=print \
+          --font="Courier New" \
+          --font-size=9 \
+          > "$OUTPUT_FILE"
+
+echo "Done! Saved to $OUTPUT_FILE"