        }
        return articleFactory?.getSpec(code: code, period: period, version: version)
    }

    func getConceptSpec(code: ConceptCode, period: IPeriod, version: VersionCode) -> ConceptSpec? {
        if  (conceptFactory == nil) {
            return nil
        }
        return conceptFactory?.getSpec(code: code, period: period, version: version)
    }
    func buildArticleFactory() -> Bool {
        return false
    }
    func buildConceptFactory() -> Bool {
        return false