Schema version and content types

[valentin-gauthier-geosiris]

Support for schema_version and content_types across RESQML versions

Context

There is an important distinction between:

• EPC content types (in [ContentType].xml): EPC Documentation
• XML content types (in object XML, via DOR): EID Documentation

Issue Identified

According to the EID documentation:

"schemaVersion is exactly the version attribute of the associated data object schema."

⚠️ Critical point: This refers to the version attribute of the XSD schema, NOT the schemaVersion attribute of the XML object.

Differences between RESQML versions

Version	schemaVersion attribute	version attribute (XSD)	Constraint
RESQML 2.0.1	Unconstrained (can be "2.0.1")	"2.0.1"	None
RESQML 2.2	Constrained (format "digitdigit" → "22")	"2.2"	Strict format

Tasks

• Review current schema_version handling in EPC content types
• Ensure that schemaVersion uses the XSD version attribute, not the object's schemaVersion attribute
• Add tests for RESQML 2.0.1 vs 2.2
• Document this differentiated behavior