The TEXT_PROP_NAME pass-through specifies which pre-existing property on the input data record will be used as the source for term extraction.

The TEXT_PROP_NAME pass-through is mandatory. Note that the value for this pass-through specifies a source property, not a Guided Search property. This property will then be mapped to a dimension.

If you want to extract terms from multiple properties, a pipeline component must combine the text from the multiple properties into one text property. The name of that text property is then used for the TEXT_PROP_NAME pass-through.