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|-
| '''Errors'''
|{{Error|BXDB0001|#Errors}} {{Code|$nodes}} contains a node which is not a [[#Database Nodes|database node]].
|}
|-
| '''Summary'''
|Returns the ''pre'' values of the nodes supplied by {{Code|$nodes}}, which must all be [[#Database Nodes|database nodes]].<br/>The ''pre'' value provides access to a database node in constant time, but it is ''transient'', i.e., it may change when database updates are performed.
|-
| '''Errors'''
|{{Error|BXDB0001|#Errors}} {{Code|$nodes}} contains a node which is not a [[#Database Nodes|database node]].
|-
| '''Examples'''
