Data transformation persistence

The current version of data transformation persistence is a simple XML with rules defined for each data template node to include in the transformation process, and the keys and values to evaluate for each rule:

<tdt:rule path="somePath">
   <tdt:value key="someKey">someValue</tdt:value>
   <tdt:value key="someKey">someValue</tdt:value>
   ...
</tdt:rule>

Note:

Even though transformation persistence may change in the future, this XML is used as reference in this document when describing different features such as XPath functions and transformation variables. Transformation persistence is not visible in StoryTeller, and you do not use it explicitly to define transformations in the StoryTeller GUI.

A simple data transformation is shown in the example below.

<tdt:transformation> <tdt:rule path="/data/message/Name"> <tdt:value key="text()">/data/message/Name</tdt:value> </tdt:rule> <tdt:rule path="/data/message/Street"> <tdt:value key="text()">/data/message/Street</tdt:value> </tdt:rule> <tdt:rule path="/data/message/blkProducts"> <tdt:value key=".">/data/message/blkProducts</tdt:value> <tdt:value key="recurse">.</tdt:value> </tdt:rule> </tdt:transformation>

The corresponding data template is shown below.

<data> <message> <FirstName>?</Name> <Street>?</Street> <blkProducts> <Product>?</Product> <Price>?</Price> </blkProducts> </message> </data>

The image and XML below illustrate a transformation rule in the Define Transformation dialog box and the corresponding rule in the data transformation XML. Note that the values are dummy values used for comparison between the GUI and the XML.

<tdt:rule path="/data/message/CustomerData/Category"> <tdt:value key="union">unionVal</tdt:value> <tdt:value key=".">repeaterVal</tdt:value> <tdt:value key="recurse">recurseVal</tdt:value> <tdt:value key="$var">varVal</tdt:value> <tdt:value key="text()">textVal</tdt:value> <tdt:value key="@name">attributeVal</tdt:value> </tdt:rule>