This document defines a simple RDF vocabulary for the named metadata fields embedded within PNG digital image files.
This is a work in progress, and has no formal status within W3C Process. Although RDF vocabularies once deployed should remain static, the current document should be considered volatile, ie. subject to arbitrary change.
The PNG specification describes a number of embedded metadata fields. This document reflects them into the RDF information model by assigning them unique Web identifiers (ie. URIs).
The following fields are defined:
internally, generates soif-like fields image-format, image-colors, image-width, image-height and image-type@@todo... (do these belong here or another doc?).