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Diffstat (limited to 'data/ontology/headings.osxml')
| -rw-r--r-- | data/ontology/headings.osxml | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/data/ontology/headings.osxml b/data/ontology/headings.osxml new file mode 100644 index 0000000..1319306 --- /dev/null +++ b/data/ontology/headings.osxml @@ -0,0 +1,33 @@ +<?xml version="1.0" standalone="yes"?> +<ontology name="headings"> + + <import rel="ontology" src="book"/> + + <struct name="heading" cardinality="1" transparent="true"> + <!-- The parent mechanism is a curious thing. Remind yourself + that parent-child-relationship in this sense are mediated + by fields. So we must either reference a field that is + already there or declare a new one on the fly. --> + <parentRef ref="book.book"> + <field name="heading" isSubtree="true" optional="true"/> + </parentRef> + <parentRef ref="book.chapter"> + <field name="heading" isSubtree="true" optional="true"/> + </parentRef> + <parentRef ref="book.section"> + <field name="heading" isSubtree="true" optional="true"/> + </parentRef> + <parentRef ref="book.subsection"> + <field name="heading" isSubtree="true" optional="true"/> + </parentRef> + <parentRef ref="book.paragraph"> + <field name="heading" isSubtree="true" optional="true"/> + </parentRef> + <!-- regarding its fields we have a problem here. We do not want to + declare a new field, because in fact we want to allow every + bit of content that a paragraph would allow - also considering + possible extensions of paragraph by other ontologys. + So we need to reference the default field of paragraph. --> + <fieldRef ref="book.paragraph.$default"/> + </struct> +</ontology> |