Changes

The [[Database Module#db:node-pre|db:node-pre]] and [[Database Module#db:node-id|db:node-id]] functions can be called to retrieve the ''PRE'' and ''ID'' values of a node. [[Database Module#db:open-pre|db:open-pre]] and [[Database Module#db:open-id|db:open-id]] can be used to retrieve a specific node. ''ID'' lookups can be expensive; the [[Options#UPDINDEX|UPDINDEX]] option can be turned on to build an additional index and speed up the process.