Hi Norm (and all other schema addicts), I have been creating DocBook customization which have to add new attributes to all elements. I recognized that currently common attributes are defined by two patterns:
db.common.attributes =
db.xml.id.attribute?
& db.version.attribute?
& db.xml.lang.attribute?
& db.xml.base.attribute?
& db.remap.attribute?
& db.xreflabel.attribute?
& db.revisionflag.attribute?
& db.dir.attribute?
& db.effectivity.attributes
db.common.idreq.attributes =
db.xml.id.attribute
& db.version.attribute?
& db.xml.lang.attribute?
& db.xml.base.attribute?
& db.remap.attribute?
& db.xreflabel.attribute?
& db.revisionflag.attribute?
& db.dir.attribute?
& db.effectivity.attributes
This means that one have to extend two named patterns if new attributes
are to be everywhere, like:
db.common.attributes &= pattern.for.new.attributes
db.common.idreq.attributes &= pattern.for.new.attributes
What about introducing new named pattern for extensibility:
db.extension.attributes = empty
and adding it to db.common.attributes and db.common.idreq.attributes:
db.common.attributes =
db.xml.id.attribute?
& db.version.attribute?
& db.xml.lang.attribute?
& db.xml.base.attribute?
& db.remap.attribute?
& db.xreflabel.attribute?
& db.revisionflag.attribute?
& db.dir.attribute?
& db.effectivity.attributes
& db.extension.attributes
db.common.idreq.attributes =
db.xml.id.attribute
& db.version.attribute?
& db.xml.lang.attribute?
& db.xml.base.attribute?
& db.remap.attribute?
& db.xreflabel.attribute?
& db.revisionflag.attribute?
& db.dir.attribute?
& db.effectivity.attributes
& db.extension.attributes
Addition of new global attributes would be then simpler, just:
db.extension.attributes &= pattern.for.new.attributes
What do you think?
Jirka
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Jirka Kosek e-mail: [EMAIL PROTECTED] http://xmlguru.cz
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