# SPL notation

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**SPL** (**Sentence Plan Language**) is an abstract [notation](/source/Writing_systems) representing the semantics of a [sentence](/source/Sentence_(linguistics)) in [natural language](/source/Natural_language).[1] In a classical [Natural Language Generation](/source/Natural_language_generation) (NLG) workflow, an initial text plan (hierarchically or sequentially organized factoids, often modelled in accordance with [Rhetorical Structure Theory](/source/Rhetorical_structure_theory)) is transformed by a sentence planner (generator) component to a sequence of sentence plans modelled in a Sentence Plan Language. A surface generator can be used to transform the SPL notation into natural language sentences.

Probably the most widely used SPL language used today (2022) is AMR ([Abstract Meaning Representation](/source/Abstract_Meaning_Representation), see there for further references), but is owes parts of its popularity to its application to NLP problems other than NLG, e.g., machine translation and semantic parsing.[2]

## See also

- [Natural language generation](/source/Natural_language_generation)

## References

1. Kasper, Robert T. (1989). ["A flexible interface for linking applications to Penman's sentence generator"](http://portal.acm.org/citation.cfm?doid=100964.100979). *Proceedings of the Workshop on Speech and Natural Language - HLT '89*. Philadelphia, Pennsylvania: Association for Computational Linguistics. [doi:10.3115/100964.100979](https://doi.org/10.3115/100964.100979)

1. L. Banarescu, C. Bonial, S. Cai, M. Georgescu, K. Griffitt, U. Hermjakob, K. Knight, P. Koehn, M. Palmer, and N. Schneider (2013) "[Abstract Meaning Representation for Sembanking](https://amr.isi.edu/a.pdf)", Proc. Linguistic Annotation Workshop.

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