constraint declarationcontains declarations pertaining to formal constraints expressed elsewhere in constraintSpec elements
Each <constraintDecl> element should have a @scheme attribute that is distinct from that of all the other <constraintDecl>s.
supplies the name of the language to which the declarations herein applyISO Schematron
The declarations contained in a particular
constraintDecl (including queryBinding, if
present) apply to the constraintSpec elements whose
scheme matches the scheme of the
constraintDecl.
query language bindingspecifies the query
language binding for rule-based schema expressions in
constraintSpec elements that have a matching
scheme attribute
The suggested values above are the values reserved by the
Schematron specification. Only exslt,
stx, xslt, xslt2,
xslt3, xpath2, and xpath3 are
defined by the specification. Most processors only support one
or more of xslt, xslt2, and
xslt3.