>The approach is very simple. Every document has a field for a unique identifier, >a field for the identifier of its immediate parent, and a field for those of all >ancestors. This allows you to write queries such as "name:human ancestor:2759" to find >organisms that have "human" in their name, and are Eukaryotes (but not, say, viruses).
>One drawback of this approach is that doing incremental updates is not possible, or at >least very complicated (duplicated information in the ancestor field), and you must be >careful about the order in which you add documents to the index (parent before child). Are these fields and their values added during the index operation? I mean is it possible to add in the fields at a later time (ie after indexing). What about updating the fields? It seems like I have to remove the index item and then re-index it in again? --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
