A string value is one or more Unicode characters (letters, numbers, and punctuation characters). You can include a string in your expressions by enclosing the string characters in single quotation marks, for example:
'This is a string value.'
The string above is returned as:
This is a string value.
If you need to include single quotation marks as part of the string, simply enter 2 single quotations. For example:
'Don''t'
The string above is returned as:
Don't
To indicate a string, use single quotation marks ' '. Do not use double quotation marks “ “ as these are for indicating tags.