16. A computer-implemented method for interrogating an electronic catalog where catalog objects are arranged as entities at nodes in a node hierarchy, said method comprising: providing attribute relevance value for attributes of the entities; and enabling use of said attribute relevance values of the attributes in forward-checking parametric searching.
16. A computer-implemented method for interrogating an electronic catalog where catalog objects are arranged as entities at nodes in a node hierarchy, said method comprising: providing attribute relevance value for attributes of the entities; and enabling use of said attribute relevance values of the attributes in forward-checking parametric searching. 19. The method of claim 16, including attributing an attribute relevance value of weakly relevant to an attribute applicable to only a subset of the entities of a node in the hierarchy.