return (value == null) || (value.trim().length() < 1);
    }

    @Override
    public String getClassifier() {
        return classifier;
    }

    @Override
    public boolean hasClassifier() {
        return classifier != null && !classifier.isEmpty();
    }

    @Override
    public String getScope() {
        return scope;
    }

    @Override
    public String getGroupId() {