Filter function - select attribute on a repetetive element based on attribute existence

Is there a way to retrieve an attribute in a filter function in a data flow for a repetitive element and filter on its attribute existence?

For example, the AlternateDocumentID/ID as a set of attributes, for example the schemeName. In some cases, the schemeName does not exists on one of the element in the standard BOD and I want to retrieve its value so I can compare it with another ID that has a specific schemeName. Currently it looks like I can only filter on a specific value of the attribute, not it's existence.

Or is there a way to manually edit the xpath since I know how to define it manually?

I would like to avoid having to create a mapping for it since it seems unnecessary.

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Kevin Heiman

I am unclear on what you are asking for in retreiving a value for some attribute that is not present/ does not exist.

There is a Attribute Existence condition, maybe that is what you are looking for?

Daniel Henningsver

I can give an example. The BOD has the following elements:

I want to compare both ID. When I retrieve the value I can make a filter and the elements attribute, so if I select ID, I can then filter on schemeName="Y", but I cannot filter where schemeName is missing in order to retireve both of the IDs.

Legacy Contributor

Is the issue due to two ID's ?

Daniel Henningsver

I need to compare these two values of ID (X and Z), I'm open do any solutions in the dataflow.

Brandon Watson

DaHen - You will just need to add a Filtered value for that path. For example, the XPath for "X" is /ItemID/ID. While the XPath for 'Y" is /ItemID/ID[@schemaName="Y"]. Below is an example of filtered values in my XPath. Hopefully this helps.

Daniel Henningsver

Hi Brandon,

Would that work also when the ID without schemeName comes last in the list. The XPath for /ItemID/ID will have multiple hits since it is not checking for schemeName. Which one will it pick?

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