People sometimes want to attach metadata to a TEI document that doesn't fit into an existing header element. For example, you might want to attach Dublin Core metadata, or you might want to include Cataloguing-in-Publication data for the TEI document. It would be good to have a place for such metadata.
We might create a new optional child of
<teiHeader> called something like
<containerForOtherMetadata>. In it you could put elements from another namespace (like
<dc:title>), or you might create your own elements (like
<cip>). I'm not sure what the content model for
<containerForOtherMetadata> should be in order to allow for these things. Maybe it actually requires that
<containerForOtherMetadata> be in a different namespace.
(It's possible that before this ticket is resolved we will have added a new element for CIP data as a child of
<publicationStmt>. That idea is also being considered on TEI-L as I write this.)