+ - INTERFACE CHANGE: Age values are now parsed: an extra type is added to
+ the types possible in a Gedcom_val: an age_value (see documentation for
+ details). So, instead of GEDCOM_STRING, you now need to use GEDCOM_AGE
+ for age values.
+ As a quick change, you can use the raw_value instead of the parsed_value
+ until you make the real change of using the struct age_value.
+
+ - INTERFACE CHANGE: The type of an xref_value can also be XREF_ANY, if
+ the actual type is not known yet. This is e.g. used in the case of an
+ association (ASSO): the cross-reference can be any object type, the
+ actual type is given by the TYPE subtag.
+