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A.8. Schematron

Schematron is a XPath/XSLT-based language for defining context-dependent rules. Schematron doesn't directly support structure or datatype validation, but a schema author may write rules that implement these checks. To write a full schema with Schematron, the author needs to take care to include all the rules needed to qualify the structure of the document. Table A-4 provides the fact sheet for Schematron.

Table A-4. Schematron fact sheet

Author:

Rick Jelliffe and other contributors. Will be described by ISO/DSDL.

Status:

Unofficial.

Location:

http://www.ascc.net/xml/schematron.

Type:

Rule-based.

PSVI:

No.

Structures:

No (although the structure can be controlled by rules).

Datatypes:

No (although the datatypes can be controlled by rules).

Integrity:

No (although the integrity can be controlled by rules).

Rules:

Yes.

Vendor support:

Low but increasing.

Miscellaneous:

Pure rule expression. Can be embedded in W3C XML Schema and RELAX NG.



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