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Source

Semantics

The role type Source corresponds to the requirement that the associated player in a Pipe connection be a stream of data that is being read from the front of a sequential file or that is being generated as output from a filter component. The player type ReadNext in UniCon captures the semantics of the stream being read from a sequential file. In this case, the stream is actually read as a series of data blocks whose format is specified in the
RecordFormat property in the SeqFile component. The player type StreamOut in UniCon captures the semantics of the data stream being generated as output by a Filter component. The responsibility of the ReadNext player is to act as a stream of data being read from the front of a sequential file in a Pipe connection. The responsibility of the StreamOut player is to act as a stream of data being written to a pipe in a Pipe connection.

In a Pipe connection there must be exactly one stream of data being written to the pipe or being read from the file (i.e., one Source role/player association).