This package provides a set of classes which can be used to make lightweight queries of an RI 1.0-compliant IVOA registry. In the Virtual Observatory (VO), registries provide a means for discovering useful resources, i.e., data and services. Individual publishers offer the descriptions for their resources ("resource records") in publishing registries.

This is not an all-singing or all-dancing registry client. The focus is on something which does a limited job fast and in a small memory footprint.