+ <field>
+ <name>data_type</name>
+ <title>Data Type for this option group</title>
+ <type>varchar</type>
+ <length>128</length>
+ <comment>Option group description.</comment>
+ <pseudoconstant>
+ <callback>CRM_Utils_Type::dataTypes</callback>
+ </pseudoconstant>
+ <add>4.7</add>
+ </field>