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 two number or date values	the two values are stored in a String as : "min;max" Example : Product [ ExpirationDate <> 2020-02-02;2021-02-02
    #	not in an array of values	the list is a String of values separated with ';' : Example : Game [ Alias # FIFA;MINECRAFT ]
    €	in an array of values	the list is a String of values separated with ';' : Example : Planet [  Name € Mercury;Earth]

     

• Metadata:

         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 ... 

         Exemple :

• Links

        To call values from links, insert "!" at the beginning of the alias. For example: !key will refer to the linked value associated with the key.

• Extrametadata:

        To call values from extrametadata, insert "§" at the beginning of the alias. For example: §key will refer to the value associated with the key in extrametadata.

• Projection:
  To project into a certain value you can use :
  <xsl:value-of select="ixf:GetTracking(Order[§xTraMetaDataKey = 'Value']/OrderType)"></xsl:value-of>

• Include Keys:
  Specifies the keys to be fetched. If it is null or empty, all keys will be fetched. keys are separted by ";" and if we want to fetch keys in subTracking we can use this expression for example 'SubTrk.SubTrkLevel2.subTrkLevel3.key'. This parameter is optional.
  <xsl:value-of select="ixf:GetTracking(Order[§xTraMetaDataKey = 'Value'],'fetchLinks','','','Partner.Name;FetchKey1;FetchKey2')"></xsl:value-of>