Defines the UPnP A/V Datastructure Template (AVDT). Root element. Identifies the data structure being described. Scoped by the contextID element. Contains all of the field elements for this data structure. Identifies one of the fields of this data structure. Includes: name, dataType and elements. 'minCountTotal' represents the minimum number of times this field MUST occur in each XML instance document.(MUST be >= 0) 'maxCountTotal' represents the maximum number of times this field may occur in each XML instance document.(MUST be >= 0) When this dataType contains a CSV list, 'minListSizeTotal' represents the minimum number of values that MUST appear in the list. When this dataType contains a CSV list, 'maxListSizeTotal' represents the maximum number of values that MUST appear in the list. Element identifies field name. Spec defines this as either a "QName" or "QName '@' NCName". This is difficult to define in XML Schema, so it's typed as a string right now. element identifies data type of this field. element indicates allowed usages. 'minCount' represents the minimum number of times this field MUST occur with one of the values specified in this allowedValueDescriptor. 'maxCount' represents the maximum number of times this field may occur with one of the values specified in this allowedValueDescriptor. When this dataType contains a CSV list, 'minListSize' represents the minimum number of values that MUST appear in the list. When this dataType contains a CSV list, 'maxListSize' represents the maximum number of values that MUST appear in the list. element indicates dependency with field. element identifies that any value can be used. element indicates a value list. element identifies a value. element indicates a value range. XML decimal, float or double data type. element indicates an allowed value list.