View source for Rule (Golly)

{{FormatInfo
|formattype=electronic
|subcat=Scientific Data formats
|extensions={{ext|rule}}, {{ext|table}}, {{ext|tree}}, {{ext|colors}}, {{ext|icons}}
|released=2005?<ref>Release of Golly (http://golly.sourceforge.net/Help/changes.html → "Initial version 0.1 released July 2005")</ref>
}}

The "'''Rule'''" format is used by the program Golly to specify rules of cellular automata, as well as their visual appearance. It consists of one multi-section file, with the extension ".rule"; however, old (pre-2013<ref>http://golly.sourceforge.net/Help/changes.html →  "Changes in version 2.5 (released June 2013)"</ref>) versions split up each of what became sections into their own files, with the extensions ".table", ".tree", ".colors", and ".icons"<ref>http://golly.sourceforge.net/Help/formats.html#deprecated</ref>, the most important being .table and .tree.

== Identification ==
The current rule format starts with [[ASCII]] {{magic|@RULE}}.

== Software ==
* [http://golly.sourceforge.net/ Golly]

== Specifications ==
* [http://golly.sourceforge.net/Help/formats.html#rule Description of the current (2020) format]
* [https://github.com/gollygang/ruletablerepository/wiki/TheFormat Description of the .table format]

== See Also ==
* [[MCell]]

== References ==
<references />

<!-- This is not a saved game; it only saves the rules for a CA, not the state of anything in one that uses those rules -->