percent-encoding in tel URIs

hello.

i am currently rewriting the sms URI scheme draft with the goal to reuse 
the phone number definition in the tel URI scheme. the problem is that 
the tel URI scheme is extremely permissive and allows all URI characters 
in its isdn-subaddress syntax part. however, the way i am reading the 
spec, all URI reserved characters have to be percent-encoded when 
appearing in an isdn-subaddress. is that correct? i am asking this 
because i need some separator in the sms URI scheme for a sequence of 
phone numbers (if a SMS should be sent to more than one receiver). the 
current syntax uses ",". the way i am reading the tel URI scheme spec, i 
can still use the "," in the sms URI scheme, and "," in its literal form 
will separate phone numbers, whereas "," as part of a isdn-subaddress 
has to be percent-encoded. is that correct?

tel URI scheme RFC: http://tools.ietf.org/html/rfc3966
sms URI scheme draft: 
http://www.ietf.org/internet-drafts/draft-wilde-sms-uri-15.txt

thanks a lot,

erik wilde   tel:+1-510-6432253 - fax:+1-510-6425814
        dret@berkeley.edu  -  http://dret.net/netdret
        UC Berkeley - School of Information (ISchool)

Received on Monday, 30 June 2008 07:03:06 UTC