Btw, this was in response to:
On Jan 9, 2011, at 6:15 AM, Sam Sethi wrote:
I am looking to use OExchange for a new site. I was curious if anyone
had implemented support for CommonTag (RDFa/Google Snippets) -
.. The extract below implies that
tags in OExchange today are comma delimited but if a URL has semantic
markup then the target is free to extract that extra data. But I want
to ensure the user is given semantic tag suggestions from either
FreeBase or DBPedia. Is there any reason why I cannot do this?
(optional) - from OExchange Spec
A set of comma-delimited "tags" that further describe the content. The
meaning of tags is determined by the target, but a target should not
heavily overload the meaning of tags beyond the generally accepted
one: text strings used by users to assist in organizing content. This
parameter is a CSV-format string obeying the rules for line content
from RFC 4180. Specifically, a list of comma-separated values with no
trailing comma. Values with commas in them must be placed in double
quotes (e.g. foo, bar, "Miami, FL").
Note that it is fully expected that URLs will increasingly contain
microformat, open graph protocol, RDFa, and other meta information via
appropriate specifications and channels. Targets are free to inspect
for these as they would any URL.