The usage of <xs:choice maxOccurs="unbo unded">
When we want to define a set of elements that could be in any order and
with any occurences (0-unbounded), we can use <xs:choice
maxOccurs="unbo unded">
But I alway think that is not a good schema definition for XML files,
and it must influence the writing and reading performance of these set
of elements if there are large amounts of sub-elements. We can imagine
that the retrieval of any single element will need to loop through all
the subelements.... ...
Any advices of this will be highly appreciated!!
2  3127 
mavis wrote: But I alway think that is not a good schema definition for XML files,
and it must influence the writing and reading performance of these set
of elements if there are large amounts of sub-elements.
If there are many sub-elements, it takes more time to read them than if
there are only a few. The use of maxOccurs="unbo unded" (or simply not
specifying maxOccurs at all) doesn't change that. If anything, unbounded
might reduce parsing cost because there's no need to maintain a counter
and check whether it has been exceeded.
You're wasting time trying to micro-optimize the wrong things.
--
() ASCII Ribbon Campaign | Joe Kesselman
/\ Stamp out HTML e-mail! | System architexture and kinetic poetry
I guess whether it is in order does make difference..
Joe Kesselman wrote: mavis wrote: But I alway think that is not a good schema definition for XML files,
and it must influence the writing and reading performance of these set
of elements if there are large amounts of sub-elements.
If there are many sub-elements, it takes more time to read them than if
there are only a few. The use of maxOccurs="unbo unded" (or simply not
specifying maxOccurs at all) doesn't change that. If anything, unbounded
might reduce parsing cost because there's no need to maintain a counter
and check whether it has been exceeded.
You're wasting time trying to micro-optimize the wrong things.
--
() ASCII Ribbon Campaign | Joe Kesselman
/\ Stamp out HTML e-mail! | System architexture and kinetic poetry This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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