Morten W. Petersen wrote:

I've managed using the ZCatalog now. However, I have a small problem:

When I instansiate a ZCatalog at the root of a tree, and search for all objects matching a given meta-type, all the objects in the entire tree are returned.

Is there a way to instruct the ZCatalog instance that it should only return objects from within a certin part of the tree, without instansiating a new ZCatalog instance in the given subtree?

Yes. Create a keyword index in your catalog called "path_kw_for_catalog". Create an external method called "path_kw_for_catalog" that, for an object, returns a list of strings that uniquely represent the physical path to that object, and to each of its parents by containment. Create an external method "path_kw" that, for an object, returns a string that uniquely represents the physical path to that object. Then, query your catalog using that keyword index, and the results path_kw for the path you want results from under. As an example, path_kw_for_catalog might return ['foo_bar_baz', 'foo_bar', 'foo'] for an object at http://your.server.net/foo/bar/baz In the same example, path_kw would return 'foo_bar' for the object at http://your.server.net/foo/bar I don't know whether you can use the results of string.join(getPhysicalPath(), '/') as a keyword in a KeywordIndex in a ZCatalog. In the following methods, I'm assuming that you can't. They can be simplified if it turns out you can. I'm also assuming that space characters are bad in keyword indexes. Again, I might be completely wrong. I guess I should check. Anyhow, these methods should give you the general idea: from string import join, replace def kw_path_for_catalog(self): keywords=[] pp=self.getPhysicalPath() for p in range(2, len(pp)+1): keywords=keywords+[join(map(fix_bad_chars, pp[1:p]), '_')] return keywords def kw_path(self): return join(map(fix_bad_chars, self.getPhysicalPath()[1:]), '_') def fix_bad_chars(s): return replace(s, ' ', 'x') -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net