====== Logical expressions ======

You can use [[wp>XPath|XPath]] to formulate logical conditions in the mappings, so it is very easy to implement case differentiations in mappings.

==== List of logical expressions: ====
  
If you enter the following //XPath expressions// as selection of a RuleSet, rules within this Ruleset are only applied if the XPath expression applies, i. e. logical //"true"// results.
^ Logical expression ^ Description^
|//[@DocNumber>0]//|If DocNumber has a value //greater than 0//, execute rule of a ruleset.|
|//[@DocNumber>0 and @DocNumber<2]//|If DocNumber has a value //greater than 0// and //less than 2//, execute rule of a ruleset.|
|//[@DocNumber>0 or @DocNumber>2]//|If DocNumber has a value //greater than 0// or //greater than 2//, execute rule of a ruleset.|
|//[@DocNumber>=1]//|If DocNumber has a value //greater than or equal to 1//, execute rule of a ruleset.|
|//[@DocNumber!=0]//|If DocNumber has a value //other than 0//, execute rule of a ruleset.|