This package provides classes which enable filtering or subsetting of a structure's constituent components. For example, an instance of the {@link edu.sdsc.mbt.filters.CAlphaAtomFilter} class could be passed to the "createStructureComponentIterator" method of the {@link edu.sdsc.mbt.Structure} class in order to create a {@link edu.sdsc.mbt.StructureComponentIterator}. Subsequent calls to this iterator's "next" method would enable an application to step through only C-Alpha atoms within the sturcture.