We have yet to deal completely with Schema and namespace versioning.
(1)
One approach would look like the following:
Table 1 ??1: XML Namespaces in this standard
Prefix
Namespace
emix:
http://docs.oasis-open.org/ns/emix/2011
siscale
http://docs.oasis-open.org/ns/emix/siscale/2011
power:
http://docs.oasis-open.org/ns/emix/power/2011
resource:
http://docs.oasis-open.org/ns/emix/power/resource/2011
(2)
An alternate approach would look like
Table 1 ??1: XML Namespaces in this standard
Prefix
Namespace
emix:
http://docs.oasis-open.org/ns/emix/2011/
siscale
http://docs.oasis-open.org/ns/emix/2011/siscale
power:
http://docs.oasis-open.org/ns/emix/2011/power
resource:
http://docs.oasis-open.org/ns/emix/2011/power/resource
(3)
Still another, which we seem to have adopted implicitly is
Table 1 ??1: XML Namespaces in this standard
Prefix
Namespace
emix:
http://docs.oasis-open.org/ns/emix/
siscale
http://docs.oasis-open.org/ns/emix/siscale
power:
http://docs.oasis-open.org/ns/emix/power
resource:
http://docs.oasis-open.org/ns/emix/power/resource
There are then the various approaches which summarize as ??putting v1.0 in place of the 2011 in alternates (1) and (2)
This is confusing similar to but not identical to the similar issue of persistence of artifacts. In general, I recommend that we remain consistent with W3C Guidelines which are oft-quoted as follows:
<xs:annotation>
<xs:documentation>In keeping with the XML Schema WG's standard versioning
policy, this schema document will persist at
http://www.w3.org/2005/08/xml.xsd.
At the date of issue it can also be found at
http://www.w3.org/2001/xml.xsd.
The schema document at that URI may however change in the future,
in order to remain compatible with the latest version of XML Schema
itself, or with the XML namespace itself. In other words, if the XML
Schema or XML namespaces change, the version of this document at
http://www.w3.org/2001/xml.xsd will change
accordingly; the version at
http://www.w3.org/2005/08/xml.xsd will not change.
</xs:documentation>
</xs:annotation>
This would result in a statement as follows:
In keeping with the XML Schema WG's standard versioning policy, the schemas defined in this specification will persist in http://docs.oasis-open.org/ns/emix/2011/06/ . At the date of issue, each can also be found at http://docs.oasis-open.org/ns/emix/2011/ . The schema documents at that URI may however change in the future, in order to remain compatible with the latest version of EMIX Specification. In other words, if the schemas namespaces change, the version of these document at http://docs.oasis-open.org/ns/emix/2011/ will change accordingly; the versions at http://docs.oasis-open.org/ns/emix/2011/06/ will not change.
??The single biggest problem in communication is the illusion that it has taken place. ?
?? George Bernard Shaw.
Toby Considine TC9, Inc
TC Chair: oBIX & WS-Calendar
TC Editor: EMIX, EnergyInterop
U.S. National Inst. of Standards and Tech. Smart Grid Architecture Committee
Email:
Phone: (919)619-2104
http://www.tcnine.com/ blog: www.NewDaedalus.com
