What is lft and rgt for?

[turningp01nt]

I am trying to figure out what the ID numbers for lft and rgt coorilate to.

The only mention of them was in this archived thread http://xenforo.com/community/thread...-from-being-created-during-installation.8408/

If anyone know what they are or what they are used for please let me know.

Thanks

 

[SchmitzIT]

I'm assuming it's to do with the node placement in the tree.

If you take note of the lft and rgt order for a specific node, and then add a node below that, you will see the numbers in the original node increase.

 

[Jake Bunce]

http://en.wikipedia.org/wiki/Nested_set_model

 

[turningp01nt]

Thanks a lot, can you look at this other thread i just posted, it is related to this question.

http://xenforo.com/community/thread...add-a-category-page-forum-or-linkforum.36122/