In response to the recent discussion about including price information
within a DC record, there is now a DCX schema,
http://www.loc.gov/standards/sru/resources/dcx.xsd

which is the DC schema extended to allow record metadata from the record
metadata namespace:
http://www.loc.gov/standards/sru/resources/rmd-v1-namespace-information.html

The elements are defined in the record metadata schema:
http://www.loc.gov/standards/sru/resources/recordMetadata.xsd

(This is a revision of the old record metadata schema that we created
several years ago.)

So you can create a record like this:

<srw_dc:dc xmlns:srw_dc="info:srw/schema/1/dcx"
xmlns:rmd="info:lc/xmlns/rmd-v1"
 xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="info:srw/schema/1/dcx
http://www.loc.gov/standards/sru/resources/dcx.xsd">
<dc:title>To Slide or Not to Slide</dc:title>
<dc:date>Monday</dc:date>
<dc:creator>Milledge, Lastings</dc:creator>
<rmd:creator>Pena, WM</rmd:creator>
</srw_dc:dc>

(Note that the rmd:creator is the creator of the record, and so differs from
dc:creator which is the creator of the object being described by the DC
record.)

The intent is not to allow arbitrary record metadata, only metadata from the
rmd namespace, and so if there are additional record metadata elements that
people think are useful for SRU applications we can add them.

It was suggested in the earlier discussion that if we create a schema that
allows external elements, call it DCX. However if people now use DCX to
mean DC along with arbitrary metadata elements not in the DC namespace and
not necessarily limited to the rmd namespace, then speak up and we will come
up with a name different than DCX for this schema.

Please review the elements and comment on their definitions, names,
usefulness, etc. and suggest additional elements for the namespace.

--Ray