Provides simple implementations of the interfaces defined in the apollo.dataadapter.das package. The goal is to minimize dependecy on other software packages. In particular,

- SimpleDASAdapterGUI is invoked by the Apollo framework: this in turn, this creates the SimpleDASAdapter. The adapter creates a...
- SimpleDASServer, which does direct SAX-parsing of requests, using the Content-handler classes DASDsnContentHandler, DASSegmentContentHandler, DASFeatureContentHandler and DASSequenceContentHandler. These handlers parse das-dsn, entry_points, features and dna requests respectively.
- In order to create requests, we create an instance of SimpleDASDsn and an array of SimpleDASSegment's to pass to the server. When the request is parsed, the result (obtained from the SimpleDASServer) is a list of SimpleDASDsn's or SimpleDASSegment's or SimpleDASFeature's.