RequestedAttributes and EntityAttributes

[Rod Widdowson]

> I'm 90% sure we added a filter function in 2.4 that does a simple check
> against EntityAttributes. I was positive we did that to incorporate a
> custom extension I or somebody else did to implement category-based
> attribute release. Maybe we just didn't get it ported to V3 yet.

I just looked again and the only thing like that that I can find in V2 is
AttributeInMetadata.  That *was* added in 2.4 but it looks at the requested
attributes in the ACS.
The only reference that I can find to EntityAttributes in the V2 tree are
the regexp and exact string matchers.  These were added in 2.3.4.
Looking at the svn history of the schema these three filters, plus a nameID
one are the only changes of note since 2008...
I had a quick look in extensions and didn't see anything.

But if we went to the length to do the rarer Requested Attributes it seems
strange that we didn't do the easier EntityAttributes case.  I feel that I
have missed something blindingly obvious.

Anyway, all these are ported. Plumbing is in place to deal with the second
and I'm in the process of adding plumbing for the first as well as plumbing
for the AttributeInMetadata type filter but applied to EntityAttributes.   

So if when can find the schema type which was used it won't be difficult to
fix it.

R