Hi Cerstin,
BaseX’ storage layer uses a pre/distance/size encoding for XML data (see [1]).
If you label the start elements during a pre-order traversal of an XML document
you get the value stored in pre.
The db command 'info storage' prints the pre/distance/size table for the
current database.
Cheers,
Alex
[1] http://cl.ly/2706070q3m0B013a2647
On 19.02.2012, at 17:56, Christian Grün wrote:
> Hi Cerstin,
>
> correct, new documents will aways be added after the existing
> documents, which is why the existing node ids won't change. The ids
> returned by "node-id()" won't change, too, in contrast to the values
> returned by "node-pre()".
>
> Hope this helps,
> Christian
> ___________________________
>
>> I will implement a web interface to edit and update specific nodes in an
>> existing database. This will probably be controlled mainly by the node-id.
>> Therefore it is no good idea to change the collection during the editing
>> process because node-ids would change.
>>
>> However, it seems that when adding a document to a collection it will be
>> integrated *after* all existing documents. Is it guaranteed that when
>> adding a new document to a collection, no existing node-ids are changed? I
>> would have to re-index the collection when adding new documents.
>>
>> Best regards
>>
>> Cerstin
>> --
>> Dr. phil. Cerstin Mahlow
>>
>> Universität Basel
>> Deutsches Seminar
>> Nadelberg 4
>> 4051 Basel
>> Schweiz
>>
>> Tel: +41 61 267 07 65
>> Fax: +41 61 267 34 40
>> Mail: [email protected]
>> Web: http://www.oldphras.net
>>
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