The TextIndexSpaceChars property indicates the space characters used for building the full text index for the table. Space characters are used to determine how words are separated from one another for the purposes of indexing the words in the full text index.
This property is read-only, you must alter the structure of a table in order to change it. Also, this property does not require that the table be open in order to return a value. This allows the the property to be examined without opening the table.