There are three search strategies for own entities: trait
, free-text
and keywords
, as explained in the documentation.
What I can't understand, is the allowed combinations of these options. I am able to choose either:
trait
keywords
free-text
andkeywords
Why can't free-text be chosen on it's own, only in combination with keywords
?
Edit:
Definition of free-text
, from the documentation:
When you need to extract a substring of the message, and this substring does not belong to a predefined list of possible values.
Definition of keywords
:
When the entity value belongs to a predefined list, and you just need substring matching to look it up in the sentence.
From the definition, free-text
and keywords
look mutually exclusive to me. Therefore I can't understand why I can't choose free-text
on its own, and why it is possible to choose both simultaneously.