[Zope] How to convert the url to parameter

Dear list, Probably it's a dummy question. But I just don't know how-to. Does any one know to convert the url to parameter. For example: http://somehost/parse/db_name/table_name/some_field_name/condition I would like to write a python script or dtml-method named "parse" to grab the record from database. Use the parameter to build a page from "SELECT * from db_name.table_name WHERE field_name='some_field_name' AND condition ='condition' " Thanks in advance. Terry