Hello martin Sahuc,
The Guid serves as an unique identifier of each item. They are generated using new Guid()
. There is no chance that you generate identical guid so this is why it is used for identifiers. When you create a custom indexer info the ID field is declared in the interface that you are going to use to develop your class. You could just declare it however whenever you index items in your indexer you will be filling this field with an empty Guid. Then sine you are feeding the data from an XML file I guess that you will already have your logic for getting items to be indexed and retrieving them from the indexing client later on.
This webinar will help you build your indexing client: Working with Sitefinity Search
. As you can see there the sample is also returning Guid.Empty for the item ID.
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