[xquery-talk] questions about security and dynamically
mhk at mhk.me.uk
Tue Oct 21 22:19:14 PDT 2003
> 1. Most of the XQuery implementations that I am familiar with
> supports security at the database level. An user connects to the
> repository using a loginname/password. Once authenticated, the user
> can run queries against all the data in the repository.
> Is there any implementation that associates security per
> document (or collection)?
Tamino has facilities that enable you to do this. It's not as
sophisticated as the mechanisms in SQL, but it's usually adequate.
> 2. One XQuery implementation (that I am familiar with) has implemented
> vendor extensions that allow constructing and executing a query
> dynamically. Do other implementations support a similar
Tamino doesn't let you do this "out of the box", but you could implement
the functionality if you really need it.
> 3. In my XQuery code, I want to discover if a particular library is
> available. Only if it is available, I want to execute a
> function in the
> library. If the library does not exist, that I want to
> proceed ahead
> and do other things. Can I do achieve this functionality
> using only
XQuery has no equivalent of XSLT's function-available(): all functions
are bound statically.
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