[tei-council] Consistency in attribute values

[Martin Holmes]

I've been looking at how the Guidelines exemplify the use of various 
attributes, in the interests of showing a more consistent set of 
practices, even where these don't extend to recommendations. Looking at 
idno/@type, we have this list:

Bod
cbeta
DOI
FRANTEXT
ISBN
ISSN
LT
NIST
oldCat
OTA
ota
URL
url
Wing

The obvious question for me is whether we want to adopt a standard 
policy on capitalization here; it seems odd to have "OTA" next to "ota" 
and "URL" next to "url". Do we have any preference here?

Cheers,
Martin