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Re: Serialization of XDM - Use cases / Proposal
- From: "David A. Lee" <dlee@calldei.com>
- To: Michael Sokolov <sokolov@ifactory.com>
- Date: Sat, 19 Sep 2009 08:27:45 -0400
Michael Sokolov wrote:
200909191125.n8JBPgFv006236@hades.falutin.net"
type="cite">
I have sometimes needed to be able to serialize a heterogeneous
sequence of items which may be either atomic values or nodes. I'm not
sure, but this may be what Jim is driving at. It is OK for my purpose
if the values do not carry intrinsic type information and are simply
text in the serialization, but what is important in this case is to
distinguish between the items in the sequence: they have to remain
distinct even if they are adjacent text items, say.
maybe this all just goes without saying, but somehow I couldn't
resist saying it anyhow
-Mike
This new specification would attempts to solve your problem (Mike)
http://xml.calldei.com/XDMSerialize
because it would preserve sequences and not do "sequence normalization"
on text nodes.
("A" , "B" , 1 , 2 , <foo/>} will be preserved as a sequence of
5 items, not turned into "AB12 <foo/>" as the current XDM
serialization spec does.
But it likely will not solve the problem Jim was describing (which is
already solved).
Why ? I haven't written it yet ... waiting for some more
arguments/discussions on the use cases first.
But the direction I'm going is likely going to require a 'layer' of
wrapped XML in order to preserve the XDM information such as items and
types.
This implies that to use in the context Jim was suggesting wouldn't
work because there would be an outer XML node containing the HTML nodes.
Thus the results would have to be 'unwrapped' before they could be used
in place in JSP. In which case were back to the same problem.
This does bring to mind that perhaps there is a desire for multiple
text
serialization formats, such that Jim's use case would work ...
but I think I will have enough problems coming up with a single format
thats acceptable to enough people and use cases.
Especially considering that Jim's particular case is already solved (by
simply concatenating the text serialization of each HTML node), I doubt
another spec is needed for that use case.
-David
David A. Lee
dlee@calldei.com
http://www.calldei.com
http://www.xmlsh.org
812-482-5224
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