@refIDSystemName: the name of the ID system of the Reference (or of References contained by the References collection).
@refIDSystemSource: the IRI source of the ID system of the Reference (or of References contained by the References collection).
@refType: the conceptual type of the Reference (or of references contained by the References collection).
@sameAs: an IRI that denotes the same thing as the parent Node Element.
@strength: the (defeasible) Strength of the Legal Rule.
@type: the type or class of the parent Node Element.
@under: the Legal Rule with lower priority.
C.8Non-skippable Edges (normative)
In the LegalRuleML normalized serialization, the children of Node elements can only be edge elements. An edge element MAY be empty (called a leaf element) or it MAY contain one Node element. Together, these requirements give rise to a "striped" syntax.
In the LegalRuleML compact serialization, the only edge elements in the LegalRuleML namespace that are allowed are leaf edge elements. To obtain the compact serialization from a normalized serialization of a LegalRuleML document, first delete the tags for any LegalRuleML edge elements that have children.
Further, in the LegalRuleML compact serialization, the elements in the RuleML namespace MUST also be "compactified". To accomplish this, delete the tags of the following skippable edge elements in the RuleML namespace: