...
String representation of this FieldType is its list of selections as a string, concatenated with a comma.
Example:
"1,2,24,42"
Hash format
...
Hash format of this FieldType is the same as Value object's selection
property.
...
eZ Publish 5.x | For eZ Platform & eZ Studio topics see Technical manual and User manual, for eZ Publish 4.x and Legacy topics see eZ Publish legacy