Differences

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

--- 01_user_documentation:xl_programming_language:queries [2025/01/24 11:58] – ↷ Page moved from xl_programming_language:queries to 01_user_documentation:xl_programming_language:queries gaetan
+++ 01_user_documentation:xl_programming_language:queries [2025/01/24 17:09] (current) – removed gaetan
@@ Line 1: / Line 1: @@
-====== Graph queries in XL ======
-===== Description =====
-Queries are used to query existing graphs for specific features. They are used to analyse the actual graph and search for a specific pattern.
-===== XL syntax =====
-Queries are enclosed in asterisked parenthesis: ''(* *)''
-The elements are given in their expected order. For example, ''(* Internode Internode Apex *)'' searches for a subgraph which consists of a sequence of nodes of the types ''Internode Internode Apex'', connected by successor edges.
-===== Examples =====
-  * Find all ''Internode'' nodes, and print them out:
-''println( (* Internode *) )''
-  * Find all newly created ''Internode'' nodes (with age 0):
-''(* i:Internode, (i[age] == 0) *)''
-  * Search for all ''Internode'' nodes with diameter greater than 0.01:
-''(* i:Internode, (i[diameter] > 0.01) *)''
-  * Find all pairs of segments ''F'' with distance smaller than 1:
-''(* f:F, g:F, ( (f != g) && (distance(f, g) < 1) ) *)''
-  * Find all ''Internode'' nodes, connected to a ''Leaf'' node with a branching edge:
-''(* Internode +> Leaf *)''