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--- 01_user_documentation:07_rgg_xl:02_xl:05_rule [2025/09/04 12:26] – removed - external edit (Unknown date) 127.0.0.1
+++ 01_user_documentation:07_rgg_xl:02_xl:05_rule [2025/09/04 12:34] (current) – gaetan
@@ Line 1: / Line 1: @@
+~~NOTOC~~
+====== Rule ======
+In order to combine queries and production statements to rules, the XL programming language defines three arrow symbols ''%%==>%%'', ''%%==>>%%'' and ''%%::>%%''. The first two are ''structural rules'' whose
+right-hand sides consist of production statements which define a successor graph. The third one is an ''execution rule'' which executes the statement for every match.
+Additionally, rules using ''%%==>%%'' extend rules using ''%%==>>%%'' by implicit connection transformations. I.e. with ''%%==>%%'' we can write L-system rules just as we would do this in an L-system environment.
+====== ======
+{{namespace>01_user_documentation:07_rgg_xl:02_xl:05_rule}}