early thoughts on OT and XML

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Greetings!

Great conversation today on the use of OT and XML for ODF.

The use of OT with linear systems (character offset) makes sense
because it isn't hard to determine intersection of character positions
and therefore conflict of changes, along with re-ordering the changes
to enable the most changes possible.

Not to mention re-writing the changes should earlier changes change
their offsets into the document.

What I am puzzling over (after searching for implementations of OT
with XML) is why XPath statements don't appear to fulfill a similar role
?

I have attached a file that has all the unique (element) XPaths from
part 3 of the current draft. There are 201 unique XPaths. That is
where you see:

office:document-content/office:body/office:text/text:list/text:list-item
/text:p

There are any number of text:p elements but they differ only by their
position.

Thus,
office:document-content/office:body/office:text/text:list/text:list-item
/text:p[1]

is a different text:p from

office:document-content/office:body/office:text/text:list/text:list-item
/text:p[10]

Of course, for recording changes, we could collapse
office:document-content/office:body/office:text to a single variable,
$text.

For comparison/conflict purposes, isn't it sufficient to compare the
XPaths supplemented with their location predicates?

I suppose the other difficulty is the implied requirement that
collaboration or at least the representation of collaboration be in
real time as well.

For most simple cases that should not be an issue and where conflicts
do occur, the author has to resolve the conflict. Yes?

More to follow.

Hope everyone is having a great week!

Patrick

PS: Attributes are not show so I need to generate a listing of them as
well. There's another element/attribute display that I remember from
years ago, will try to re-create or run it down.


- -- 
Patrick Durusau

Technical Advisory Board, OASIS (TAB)
OpenDocument Format TC (OASIS), Project Editor ISO/IEC 26300
Co-Editor 13250-5 (Topic Maps)

Another Word For It (blog): http://tm.durusau.net
Homepage: http://www.durusau.net
Twitter: patrickDurusau

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