Metadata

MetadataMetadata

• Literally “data about data”• 2 familiar metadata systems– Dewey Decimal System– Library of Congress

• Epub uses this to provide info about the content

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Metadata in EPUB

• Available in 3 places– The navigation (ncx) file– The packaging file (opf) file– The head element of an html/XHTML file

Metadata in HTML File

Metadata in ncx

Metadata in opf

• Minimum requirements– Unique ID (like an ISBN)– Title– Language

Metadata• Ebooks should also have:– Date (dc: date opf: event=“original publication” & dc: date

opf: event=“ops-publication”)– Publisher (dc:publisher)– Rights (dc:rights)– Creator (dc:creator)– Contributor (dc:contributor)

• Two attributes should also be used for author & contributor– opf:role (opf:role=“aut”)– opf:file-as (opf:file-as=“Austen, Jane”)

OPF metadata with Author

OPF of collection

Metadata in InDesign• InDesign provides entries for:– Identifier (dc: identifier) required for validation- needs to

match toc.ncx– author (dc:creator)– Title (dc:title)– Description (dc:description)– Keywords (dc:subject)– Copyright (dc:rights)– Language (<dc:language>en</dc:language>