Features
Some of the salient characteristics that distinguish Hartmann Pipeline from ordinary Unix pipes are:
- Filters may have multiple inputs and multiple outputs. For example, a selection filter can send the found records down one output pipe and the not found records down another.
- A linear notation for representing pipeline networks.
- An interface that allows REXX programs to act as stages.
- A pacing strategy in the Pipeline supervisor that allows, for example, a stream to be split, say by a selection filter, and the records on the output legs to be processed by other filters, then merged by a join filter and have the record order preserved in result stream.
- As implied by the previous item, data streams are (generally) not simply buffered and passed along to the next filter. The filters operate in parallel with input and output records handled by the Pipeline supervisor.
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