displayiconcould appear more than once in a DR. Since a DR may have any number of descriptor sets, and OWL (POWDER-S ) doesn't restrict cardinality of properties it's clear that multiple strings and icons may be presented to a user agent. Since it is not clear how a given UA would handle this situation, the Description Resources document will be amended to advise DR authors only to provide one string and one image to display.
<issuedby>in POWDER will be transformed into the
wdrs:issuedby property in POWDER-S. Whilst there remains some uncertainty about what this points to (
wdrs:Agentwhich would either be a union of or sub class of the other two), the XML schema and POWDER-S vocabulary are unaffected and so can be updated quickly. Secondly, following on from the last call comment and subsequent e-mail discussion last month, for the time being at least we are going to use 'describedby' as our relationship type and propose two MIME types for POWDER and POWDER-S. These will be text/powder+xml and application/powder-s+xml respectively which we believe to be in line with RFC 3023, section 2 of which includes "If an XML document -- that is, the unprocessed, source XML document -- is readable by casual users, text/xml is preferable to application/xml. [..] Application/xml is preferable when the XML MIME entity is unreadable by casual users." These are not formal resolutions of the group but indicate our current thinking. The issue of @rel registration is being discussed in various groups, not least the Semantic Web Coordination Group.