Introduction

IXpathExpression is a built-in expression language similar to the well-known Xpath language.

Use

• The current usable syntax of IXpathExpression looks like the following :  trkType [ key1 {operator} value1 AND key2 {operator} value2 ...] 

                     eg : Product [ Price <10 AND Quantity== 3 AND Category == Food] 

• The list of available operators  : 

  • ==	equals
    >=	greater or equal than
    >	greater than
    <=	less or equal
    <	less
    !=	different
    between	between two number or date values	the two values are stored in a String as : "min;max" Example : Product [ ExpirationDate between 2020-02-02;2021-02-02
    out	not in an array of values	the list is a String of values separated with ';' : Example : Game [ Alias out FIFA;MINECRAFT ]
    in	in an array of values	the list is a String of values separated with ';' : Example : Planet [  Name in Mercury;Earth]

     

• There is the possibility to call values from metadata, such as creationDate , modificationDate, jobID , userID ... by inserting '_' (underscore) at the beginning of the alias needed like : _creationDate , _modificationDate ...