<!ENTITY % attr.epoch "epoch NMTOKEN #REQUIRED">
<!ENTITY % attr.name "name CDATA #REQUIRED">
<!ENTITY % attr.ids "uid NMTOKEN #REQUIRED
gid NMTOKEN #REQUIRED">
<!ENTITY % attr.code "code NMTOKEN #REQUIRED">
<!ENTITY % attr.unit-bytes "unit CDATA #FIXED 'bytes'">