The relation struct:
var struct = module.exports = function(relationType, relationLocator, relationLabel, documentSmallIcon,
			                           documentLocator, documentLabel, documentType, sORt) {
	var result = {};
    result.relationLocator = relationLocator;
	result.relationType = relationType;
	result.relationLabel = relationLabel;
	result.documentType = documentType;
	result.icon = documentSmallIcon;
	result.locator = documentLocator;
	result.label = documentLabel;
    result.sort = sORt;
	return result;
};

Code that creates it from inside a class:
var struct = require('../util/relnstruct'); // refers to the object above

var rx = struct(relationType,pivotLocator,relationLabel,
		documentSmallIcon, targetLocator, targetLabel, nodeType,sORt);

JSON view of Good Struct in a context:

{
    "relationLocator": "climate_change_TAGTagDocumentRelationTypee164f340-8961-11e4-8eea-5d173b397214",
    "relationType": "TagDocumentRelationType",
    "relationLabel": "TagDocumentRelationType",
    "documentType": "TagNodeType",
    "icon": "/images/tag_sm.png",
    "locator": "climate_change_TAG",
    "label": "Climate Change",
    "sort": "s"
}

JSON view of bad (ubuntu) struct in similar context:
Note: relationLocator has been dropped

{
    "relationType": "TagDocumentRelationType",
    "relationLabel": "blog_TAGTagDocumentRelationType0b7f2190-8a08-11e4-94bd-db98af817586",
    "documentType": "Blog",
    "icon": "TagDocumentRelationType",
    "locator": "/images/tag_sm.png",
    "label": "blog_TAG",
    "sort": "TagNodeType"
}