Joel Burton writes:

Unfortunately, I don't find that your section on dtml-tree, nor the I agree, it is difficult to find.

I will need to tweak the style sheet for the final version or do not use section levels below 3: You find it via this path: chapter 3 DTML commands tree: interactive hierarchical display

earlier-referenced HowTo throws much light (for me, at least) on creating a dtml-tree as I am looking for on an object that I could get from a ZCatalog result. I do see discussions on how to entirely re-structure my catalog to support parent_ids and such to form a tree in a database or via attributes captured in ZSQL methods, but nothing about what I seem to be looking for. Sorry, I do not read most messages very carefully, just thim them.

Earlier questions (-> searchablge mailing list archives, Google) had the data in an external database and wanted to use the tree command to present a hierarchical view on these data. When I skimmed your message, I had the impression, that your problem was the same as the others, I had seen and responded with the Z SQL advice. But the Z Catalog is very similar to a Z SQL method (both implement the "Searchable" interface). The "tree" command requires a "branches" method or a "branches_expr" that return a list of children if applied/evaluated in a parents content. Thus, you must define such a (probably) "branches_expr". Your "branches_expr" will probably ask the Z Catalog for the children of the current node, something like: branches_expr="MyCatalog(parentId=getId())" This assumes, that each child has an attribute (or parameter less method) that returns the id of its parent. It assumes further, that this attribute is indexed. Dieter