Search indexing distinguishes between alphanumeric characters and non-alphanumeric characters and supports the ability to mark some non-alphanumeric characters as significant for search operations.
You mark a non-alphanumeric character as a search character in the Search Characters editor in Developer Studio.
Note
Search characters are configured globally for all search operations. For example, adding the plus (+) character marks it as a search character for dimension search, record search, record search group, and navigation state search operations.