transcriptClass.createProperty("id", OType.STRING).createIndex(OClass.INDEX_TYPE.UNIQUE_HASH_INDEX);
final OClass skillClass = schema.createClass("lpirtSkill");
skillClass.createProperty("name", OType.STRING).createIndex(OClass.INDEX_TYPE.UNIQUE);
final OClass studentClass = schema.createClass("lpirtStudent");
studentClass.createProperty("name", OType.STRING).createIndex(OClass.INDEX_TYPE.UNIQUE);
studentClass.createProperty("group", OType.LINK, groupClass).createIndex(OClass.INDEX_TYPE.NOTUNIQUE);
studentClass.createProperty("diploma", OType.LINK, diplomaClass);
studentClass.createProperty("transcript", OType.LINK, transcriptClass).createIndex(OClass.INDEX_TYPE.UNIQUE_HASH_INDEX);
studentClass.createProperty("skill", OType.LINK, skillClass);