From Camp 2011 Public Wiki

The datatype string is used for simple words and similar character sequences. It has the following restrictions:

• As for all properties, the sequence "::" is not possible in property values (not even inside nowiki tags).
• values must not be longer than 255 characters (if you use non-latin characters, this number might be smaller). If you need longer strings, use Type:Text.

You can use some wiki markup inside a string property such as runs of ' for bold and italic, and the markup will change the appearance of the string. You cannot embed semantic annotations inside a string property.

Enumerations

You can use the special property Allows value to restrict a property to a particular set of values. For example you could limit "Status" to certain states.

This type is among the standard datatypes of this wiki.