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Subject: RE: [xri] iquery, ifragment and xref
Wil, This problem is described in detail in
section 2.3.2 of the XRI Syntax 2.0 spec. IRIs (or other XRIs) that are
embedded as cross-references in an XRI will always need to be escaped so that
the cross-reference itself is not ambiguous. For example, if the actual query string in
the XRI below… xri://=foo*(xri://bar?baz=bar)) …is supposed to be “baz=bar)”
(not the closing paren is part of the query), then this MUST be escaped to… xri://=foo*(xri://bar?baz=bar%29) Again, see the rules at the end of section
2.3.2. (I imagine these were the ones not implemented in the OpenXRI parser yet
because they are, frankly, the tough ones!) =Drummond From: Tan, William
[mailto:William.Tan@neustar.biz] Hi folks, Sorry for the cross posting. This is an issue that I
encountered in the OpenXRI parser and triggered by Harry’s test case that
the parser currently is not able to process: xri://@example/(http://www.openxri.org/) Looking at the above example, because the identifier within
the parenthesis above is an IRI, and the closing parenthesis “)” is
a legal character in an IRI, the parser doesn’t know when the IRI
terminates and consumes everything resulting in an IRI
“http://www.openxri.org/)” and leaves the cross reference open. Ok,
this is not the reason that the parser choked – it choked because IRI
cross references are simply not implemented but I’ve encountered another two
anomalies with the XRI syntax: The ABNF for XRI uses IRI’s “iquery” and
“ifragment” which also boils down to “sub-delims”,
unlike XRI path-* productions which boil down to a much smaller
“xri-sub-delims”. This means that the parser would not be able to
disambiguate: xri://=foo*(xri://bar?baz=bar)) when the query in the embedded XRI reference is
“baz=bar)”. I’m not sure if this has been discussed on the list
before.. =wil (http://xri.net/=wil) |
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