   <!ELEMENT GIFTI (MetaData?, 
                    LabelTable?, 
                    DataArray+)>
   <!ELEMENT LabelTable (Label*)>
   <!ELEMENT DataArray (MetaData?, 
                        CoordinateSystemTransformMatrix?, 
                        Data)>
   <!ELEMENT Data (#PCDATA)>
   <!ELEMENT Label (#PCDATA)>
   <!ELEMENT Value (#PCDATA)>
   <!ELEMENT Name (#PCDATA)>
   <!ELEMENT MD (Name, Value)>
   <!ELEMENT MetaData (MD*)>
   <!ELEMENT CoordinateSystemTransformMatrix (DataSpace, 
                                              TransformedSpace, 
                                              MatrixData)>
   <!ELEMENT DataSpace (#PCDATA)>
   <!ELEMENT TransformedSpace (#PCDATA)>
   <!ELEMENT MatrixData (#PCDATA)>
   <!ATTLIST GIFTI 
      NumberOfDataArrays  NMTOKEN #REQUIRED
      Version NMTOKEN #REQUIRED>
   <!ATTLIST Label 
      Index   NMTOKEN #REQUIRED>
   <!ATTLIST DataArray 
      ArrayIndexingOrder  ( RowMajorOrder | 
                            ColumnMajorOrder ) #REQUIRED
      DataType     (NIFTI_TYPE_UINT8 | 
                    NIFTI_TYPE_INT32 | 
                    NIFTI_TYPE_FLOAT32)  #REQUIRED
      Dimensionality   NMTOKEN #REQUIRED
      Dim0         NMTOKEN #REQUIRED
      Dim1         NMTOKEN #IMPLIED
      Dim2         NMTOKEN #IMPLIED
      Dim3         NMTOKEN #IMPLIED
      Dim4         NMTOKEN #IMPLIED
      Dim5         NMTOKEN #IMPLIED
      Encoding     (ASCII | 
                    Base64Binary | 
                    GZipBase64Binary |
                    ExternalFileBinary)  #REQUIRED
      Endian       (BigEndian |  
                    LittleEndian)  #REQUIRED
      ExternalFileName    CDATA  #IMPLIED
      ExternalFileOffset  CDATA  #IMPLIED
      Intent (NIFTI_INTENT_NONE          |
            NIFTI_INTENT_CORREL          |
            NIFTI_INTENT_TTEST           |
            NIFTI_INTENT_FTEST           |
            NIFTI_INTENT_ZSCORE          |
            NIFTI_INTENT_CHISQ           |
            NIFTI_INTENT_BETA            |
            NIFTI_INTENT_BINOM           |
            NIFTI_INTENT_GAMMA           |
            NIFTI_INTENT_POISSON         |
            NIFTI_INTENT_NORMAL          |
            NIFTI_INTENT_FTEST_NONC      |
            NIFTI_INTENT_CHISQ_NONC      |
            NIFTI_INTENT_LOGISTIC        |
            NIFTI_INTENT_LAPLACE         |
            NIFTI_INTENT_UNIFORM         |
            NIFTI_INTENT_TTEST_NONC      |
            NIFTI_INTENT_WEIBULL         |
            NIFTI_INTENT_CHI             |
            NIFTI_INTENT_INVGAUSS        |
            NIFTI_INTENT_EXTVAL          |
            NIFTI_INTENT_PVAL            |
            NIFTI_INTENT_LOGPVAL         |
            NIFTI_INTENT_LOG10PVAL       |
            NIFTI_INTENT_ESTIMATE        |
            NIFTI_INTENT_LABEL           |
            NIFTI_INTENT_NEURONAME       |
            NIFTI_INTENT_GENMATRIX       |
            NIFTI_INTENT_SYMMATRIX       |
            NIFTI_INTENT_DISPVECT        |
            NIFTI_INTENT_VECTOR          |
            NIFTI_INTENT_POINTSET        |
            NIFTI_INTENT_TRIANGLE        |
            NIFTI_INTENT_QUATERNION      |
            NIFTI_INTENT_DIMLESS         |
            NIFTI_INTENT_TIME_SERIES     |
            NIFTI_INTENT_RGB_VECTOR      |
            NIFTI_INTENT_RGBA_VECTOR     |
            NIFTI_INTENT_NODE_INDEX_LIST |
            NIFTI_INTENT_SHAPE           |
            NIFTI_INTENT_UNKNOWN) #REQUIRED
   >