write a function, which takes as an argument value of attribute parentId

returns tree of all elements, referring to this id (and all nested trees)
inside call this function recursively for each element again returning next nested level

in your base XQuery call this function with selecting ids of elements, which are in the root of the document (they will probably have some empty value of @parentId or their parentId will not be found in your document)

It would be nice exercise, but I cannot afford it today.

Jan

2011/1/20 Erdal Karaca <erdal.karaca.de@googlemail.com>

I have a table that is to be transformed to a tree:

<entry id="entry1" parentId="parentOfThisEntry" />

<entry id="entry2" parentId="parentOfThisEntry" />

<entry id="entry3" parentId="parentOfThisEntry" />
<entry id="entry4" parentId="parentOfThisEntry" />

The tree structure can be constructed by the id/parentId relation.

I failed to achieve this... :-(
I am using basex 6.5.

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Ing. Jan Vlčinský
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