3.10. Program Configuration¶

As described in Section 3.1, a Phlex program starts by ingesting a configuration, which informs how the data-flow graph (e.g. see Fig. 3.1) should be established.

To support reproducibility of data, a Phlex program is configured by only one configuration document [DUNE 69], although that document may be compiled from multiple distinct sources [DUNE 133] (such as included or imported files). These documents may be written in the following languages: Jsonnet, YAML, JSON (as a strict subset of Jsonnet), or FHiCL [DUNE 72]. A given configuration can be written in any of these languages, but no configuration document may be written in more than one language.

The other details and rules by which a Phlex program is configured largely do not inform the conceptual design and are described in the technical design (under preparation).