property (with attributes)

zero or more 

Specifies a property, which has a name and a value. 

directory

domain-dir/generated/jsp/j2ee-apps/app-name/app-name_war

Specifies the absolute or relative pathname of the directory into which individual session files are written. A relative path is relative to the temporary work directory for this web module. 

Applicable only if the persistence-type attribute of the parent session-manager element is file.

persistenceScope

session

Specifies how much of the session state is stored. Allowed values are as follows: 

• session - The entire session state is stored every time. This mode provides the best guarantee that your session data is correctly stored for any distributable web module.

• modified-session - The entire session state is stored if it has been modified. A session is considered to have been modified if HttpSession.setAttribute() or HttpSession.removeAttribute() was called. You must guarantee that setAttribute() is called every time an attribute is changed. This is not a Java EE specification requirement, but it is required for this mode to work properly.

• modified-attribute - Only modified session attributes are stored. For this mode to work properly, you must follow some guidelines, which are explained immediately following this table.

Applicable only if the persistence-type attribute of the parent session-manager element is ha or replicated.