ST_VerticalAlignment is defined in sml-styles.xsd and in dml-diagramTypes.xsd. In the former, it can be top, center or bottom (among other values). In the latter, these are "t", "mid" or "b". Terminology should be consistent within a standard.
Remedy: Change the latter to use "top", "center" and "bottom" in place of "t", "mid" and "b".
ST_VerticalAlignment
te
Proposed Disposition of DIS 29500 Comment GB-0634 (Modified: 2008-01-04) Agreed; we will make the following changes to dml-diagramTypes.xsd: <xsd:simpleType name="ST_VerticalAlignment" final="restriction"> <xsd:annotation> <xsd:documentation>Vertical Alignment</xsd:documentation> </xsd:annotation> <xsd:restriction base="xsd:token"> <xsd:enumeration value="top"> <xsd:annotation> <xsd:documentation>Top</xsd:documentation> </xsd:annotation> </xsd:enumeration> <xsd:enumeration value="center"> <xsd:annotation> <xsd:documentation>Center</xsd:documentation> </xsd:annotation> </xsd:enumeration> <xsd:enumeration value="bottom"> <xsd:annotation> <xsd:documentation>Bottom</xsd:documentation> </xsd:annotation> </xsd:enumeration> <xsd:enumeration value="t"> <xsd:annotation> <xsd:documentation>Top</xsd:documentation> </xsd:annotation> </xsd:enumeration> <xsd:enumeration value="mid"> <xsd:annotation> <xsd:documentation>Middle</xsd:documentation> </xsd:annotation> </xsd:enumeration> <xsd:enumeration value="b"> <xsd:annotation> <xsd:documentation>Bottom</xsd:documentation> </xsd:annotation> </xsd:enumeration> <xsd:enumeration value="none"> <xsd:annotation> <xsd:documentation>None</xsd:documentation> </xsd:annotation> </xsd:enumeration> </xsd:restriction> </xsd:simpleType>

New enumeration values are added, old inconsistant values are not removed