90 lines
3.4 KiB
Markdown
90 lines
3.4 KiB
Markdown
# plasp [](https://github.com/potassco/plasp/releases) [](https://travis-ci.org/potassco/plasp?branch=master) [](https://travis-ci.org/potassco/plasp?branch=develop)
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> ASP planning tools for PDDL
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## Overview
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`plasp` is a tool collection for planning in [*answer set programming*](https://en.wikipedia.org/wiki/Answer_set_programming).
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`plasp` 3 supports the input languages [PDDL 3.1](https://helios.hud.ac.uk/scommv/IPC-14/software.html) (except for advanced features such as durative actions, numerical fluents, and preferences) and [SAS](http://www.fast-downward.org/TranslatorOutputFormat) (full support of SAS 3), which is used by [Fast Downward](http://www.fast-downward.org/).
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The most notable tool provided by `plasp` is `plasp translate`, which translates PDDL descriptions to ASP facts.
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## Translating PDDL to ASP Facts
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PDDL instances are translated to ASP facts as follows:
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```sh
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plasp translate domain.pddl problem.pddl
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```
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Alternatively, PDDL instances may first be translated to SAS, the output format of [Fast Downward](http://www.fast-downward.org/).
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```sh
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./fast-downward.py --translate --build=release64 domain.pddl problem.pddl
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```
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This creates a file called `output.sas`, which may now be translated by `plasp` as well.
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```sh
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plasp translate output.sas
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```
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### Solving the Translated Instance
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The translated instance can finally be solved with `clingo` and a meta encoding, for instance, [`sequential-horizon.lp`](encodings/sequential-horizon.lp):
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```sh
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plasp translate domain.pddl problem.pddl > instance.lp
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clingo encodings/sequential-horizon.lp -c horizon=10 instance.lp
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```
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### Translator Output Format
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`plasp translate` provides a uniform output format for SAS and PDDL input problems.
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See [output format](doc/output-format.md) for more details.
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If you want to write your own meta encoding for `plasp translate`’s output, this [simple example encoding](encodings/sequential-horizon.lp) gets you started.
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## Provided Tools
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```sh
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plasp <command> [<option>...] [<input file>...]
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```
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Aside from translating PDDL to ASP facts, `plasp` provides the following commands:
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| command | description |
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|---|---|
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| `translate` | Translate PDDL and SAS to ASP facts |
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| `normalize` | Normalize PDDL to plasp’s custom PDDL format |
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| `check-syntax` | Check the syntax of PDDL specifications |
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| `beautify` | Cleanly format PDDL specifications |
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| `help` | Display help message |
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| `version` | Display version information |
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`plasp help` shows a list of all commands provided by `plasp`.
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To list all available options of a command, call `plasp <command> --help` or `plasp help <command>`.
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`plasp` automatically detects the language (PDDL or SAS) of the input descriptions.
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## Building
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`plasp` is built with CMake and a C++ compiler.
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See [building](doc/building.md) for more details.
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## PDDL Feature Support
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`plasp` supports a subset of PDDL 3.1.
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See [PDDL feature support](doc/pddl-feature-support.md) for a list of supported and unsupported PDDL 3.1 features.
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## Contributors
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* [Patrick Lühne](https://www.luehne.de)
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* Martin Gebser (encodings)
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* Torsten Schaub (encodings)
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### Earlier Versions
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* René Knaebel
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* Murat Knecht
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