Differences

This shows you the differences between two versions of the page.

--- tutorials:rgg-code-structure [2026/04/24 11:43] – [XL Blocks - Rules] Tim
+++ tutorials:rgg-code-structure [2026/04/24 11:45] (current) – [XL Blocks - Rules] Tim
@@ Line 150: / Line 150: @@
-=== Graph rules ===
+=== SPO rules ===
-Graph rules are indicated by the rule arrow ''%%==>>%%''.
+SPO rules are indicated by the rule arrow ''%%==>>%%''.
 The right hand side is a semicolon-terminated list of graph statements building the replacing graph for the matched graph. While the left hand side represents a fixed graph pattern, the graph statements can build the replacing graph dynamically, including loops and conditional execution. Thus it is not always possible to find a graphical representation of the right hand side.
@@ Line 161: / Line 161: @@
-=== String rules ===
+=== Lindenmeyer rules ===
-The concept of an replacement rule in XL follows the 'Lindenmayer-form' where basically all parts of the project string that are similar to the left part (before ''%%==>%%'') are replaced by the right part ( behind ''%%==>%%'').
+The concept of an replacement rule in XL follows the 'Lindenmayer-form' where basically all parts of the project that are similar to the left part (before ''%%==>%%'') are replaced by the right part ( behind ''%%==>%%'').
 The left part can thereby be any [[tutorials:common_graph_queries|xl-query]].
 The right part (the production) is a collection of Nodes ( instances of either turtle commands, 3d objects or modules) which are linked by different edges. In the example below only successor- and branch-edges are used. A node that is separated to its predecessor by only a white space is added as a sucessor to the predecessor. A Node or a set of nodes framed by square brackets in that is added to the predecessor with a branch-edge.