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--- 01_user_documentation:06_graph:06_extent:02_index [2025/10/13 10:15] – gaetan
+++ 01_user_documentation:06_graph:06_extent:02_index [2025/10/13 10:18] (current) – gaetan
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 An extent collects its nodes not by a single list, but by a number of (doubly linked) lists. Currently, 16 lists are used, but this can easily be changed. This feature is used to partition the extents. The 16 lists are called the extent indexes.
-Extents are used by the [[:01_user_documentation:07_rgg_xl:03_query_graph|query graph]] to access the nodes of the graph. In this process, nodes can be "hidden" to queries by being on a extent index non visible by the query scope. Non visible nodes are not visited and "ignored" by the queries, they are not visited at all (thus, efficient to speed up queries). For the RGG model graph, queries use only the seven first indexes by default. The default index usage is:
+Extents are used by the [[:01_user_documentation:07_rgg_xl:03_query_graph|query graph]] to access the nodes of the graph. In this process, nodes can be "hidden" to queries by being on a extent index non visible by the query scope (see [[:01_user_documentation:07_rgg_xl:02_xl:03_query:08_extent_visibility|RGG's extent index visibility]]). Non visible nodes are not visited and "ignored" by the queries, they are not visited at all (thus, efficient to speed up queries). For the RGG model graph, queries use only the seven first indexes by default. The default index usage is:
   * 0 to 6: Default visibility - used by default in queries. Only these indexes are visible by default.
   * 7: Meta data index.