[Bug 4285] [UPD] Replacing optional content

http://www.w3.org/Bugs/Public/show_bug.cgi?id=4285





------- Comment #8 from jonathan.robie@datadirect.com  2007-02-26 23:18 -------
(In reply to comment #3)
> I don't think I understand the semantics of the proposed fold operation. If my
> existing element has children Q, T, and G, and I fold in a sequence containing
> Z, T, and K, what is the resulting sequence? Does it use schema knowledge to
> know that the Z belongs before the Q and the K belongs after the G? If the
> schema said that the K element has to come first, would it give me K Z Q T G?
> 
> If this is intended to work in the absence of a schema, I fail to see how.

My intent was indeed to allow implementations to use a schema to determine the
right place to put the data. For a view of a relational database, it would
simply put data in the corresponding column. This part of the semantics is the
reason for using "insert into" rather than specifying position.

Jonathan