Property :: key - Extract key value
The function provides access to the key value for a key definition passed in sKeyName or the currently selected sort order (access key).
Return value: Key value ( odaba::Key )
The key value is provided as typed string in ESDF or CSV format. Key components might be separated by '|' or ';'.
In order to pass no key value, an empty string ( String() ) can be passed.
// key: name;first_name
Miller;Paul // simple positioned OIF key
"Miller";"Paul Mary" // special characters must be quoted