area mmci/taglib <mm:list path="\$$userbuilder as user,\$$groupsbuilder as group"/>
RelationManager#getRelationList(NodeQuery) is missing.
Queries#addPath does not handle gracefully if an element can be both a role and a builder.
Uniquely identify datatypes.xml with id attribute on their top element.
Queries#createQuery(Cloud cloud, String startNodes, String nodePath, String fields, String constraints, String orderby, String directions, String searchDir, boolean distinct) has a dependency on ClusterBuilder