/**
     * construct a single vertex
     */
    public MetadataGraph(MetadataGraphVertex entry) throws MetadataResolutionException {
        checkVertex(entry);
        checkVertices(1);

        entry.setCompareVersion(versionedVertices);
        entry.setCompareScope(scopedVertices);

        vertices.add(entry);
        this.entry = entry;
    }
    // ------------------------------------------------------------------------

        this.md = md;
    }

    // ---------------------------------------------------------------------
    public boolean isCompareVersion() {
        return compareVersion;
    }

    public void setCompareVersion(boolean compareVersion) {
        this.compareVersion = compareVersion;
    }

    public boolean isCompareScope() {
        return compareScope;
    }

    public void setCompareScope(boolean compareScope) {