Y elements

Content models for elements beginning with "y".

Content models for `<year>`

In this document type	`<year>` contains
Bookmap	►(text data \| `<apiname>` \| `<cmdname>` \| `<keyword>` \| `<markupname>` \| `<msgnum>` \| `<numcharref>` \| `<option>` \| `<parameterentity>` \| `<parmname>` \| `<text>` \| `<textentity>` \| `<varname>` \| `<wintitle>` \| `<xmlatt>` \| `<xmlelement>` \| `<xmlnsname>` \| `<xmlpi>`)*◄

In this document type	`<year>` is contained by
Bookmap	`<completed>`, `<copyrfirst>`, `<copyrlast>`, `<started>`