Determine preferred encoding format for document-level metadata

[WaxCylinderRevival]

For now, suggestions and issues refer to possible TEI construction

http://www.tei-c.org/release/doc/tei-p5-doc/en/html/index.html

[WaxCylinderRevival]

@joewiz pointed to <xenoData>, which may be used as a container for non-TEI formats in the <teiHeader>: http://www.tei-c.org/release/doc/tei-p5-doc/en/html/ref-xenoData.html

Possible non-TEI encoding formats for FRUS document-level metadata include:

• Dublin Core
• MARCXML
• EAD
• MODS
• RDF

[WaxCylinderRevival]

Per today's conversation with @joewiz, place item-level metadata (document, editorial note, attachment) in FRUS-namespace XML wrapper and use elements of different namespaces to capture the most robust metadata in the most appropriate metadata standard. For instance, we'd likely use <tei:date from="" to="" notBefore="" notAfter="" when=""> but perhaps add <ead:genreform> and <dc:isPartOf> elements.

I suggest <frus:itemMetadata> as wrapper element for flexibility and to avoid confusion with the FRUS-specific concept of a "document."