subMapping element has the following XML attributes:
name: a required element specifying the name of the sub-attribute that is mapped.
ldapAttribute: a required element specifying the name of the LDAP attribute to which the SCIM sub-attribute maps.
transform: an optional element specifying a transformation to apply when mapping an attribute value from SCIM to LDAP and vice-versa. The available transformations are described later. Available transformations are described in Map LDAP schema to SCIM resource schema.