# Filtering and Sorting Features

Any of the blob measures listed in the preceding three sections can be used to generate a filter through which blobs can be obtained. You can define multiple filters, although only one filter per measure. You can specify that only blobs with values inside or outside a specified range for a specified measure be visible.

You can further specify the order in which the visible blobs are sorted. The sort order determines the order in which the tool returns blobs to you when you request the first, next, previous, or last blob within a particular level of the topological hierarchy.