Schematron using XPath 2.0 The sp:Axis_Bin_Set_Energy class may only be used when sp:spectral_bin_type is "energy". In the Axis_Bin_Set classes, the sp:axis_name value must correspond to the name of an axis in the referenced array object, or contain one of the special values "Row" or "Field". The sp:Axis_Bin_Set_Frequency class may only be used when sp:spectral_bin_type is "frequency". In the Axis_Bin_Set classes, the sp:axis_name value must correspond to the name of an axis in the referenced array object, or contain one of the special values "Row" or "Field". The sp:Axis_Bin_Set_Wavelength class may only be used when sp:spectral_bin_type is "wavelength". In the Axis_Bin_Set classes, the sp:axis_name value must correspond to the name of an axis in the referenced array object, or contain one of the special values "Row" or "Field". The sp:Axis_Bin_Set_Wavenumber class may only be used when sp:spectral_bin_type is "wavenumber". In the Axis_Bin_Set classes, the sp:axis_name value must correspond to the name of an axis in the referenced array object, or contain one of the special values "Row" or "Field". In the Axis_Bin_Set class, the bin_sequence_number of each Bin_Wavenumber class must be unique. In sp:Bin_Center_Lookup, exactly one of sp:bin_center_field_name, pds:Local_Identifier_Reference, or pds:Internal_Reference must be provided. The attribute sp:Bin_Center_Lookup/pds:Internal_Reference/pds:reference_type must be equal to the value 'spectral_characteristics_to_bin_center_values'. The attribute sp:Bin_Center_Lookup/pds:Local_Internal_Reference/pds:local_reference_type must be equal to the value 'spectral_characteristics_to_bin_center_values'. The sp:bin_center_field_name attribute must correspond to the name of exactly Field_Character in the referenced Table_Character object. The sp:bin_center_field_name attribute must correspond to the name of exactly one Field_Character inside a Group_Field_Character for tabulated spectra with groups. The sp:bin_center_field_name attribute must correspond to the name of exactly one Field_Binary in the referenced Table_Binary object. The sp:bin_center_field_name attribute must correspond to the name of exactly one Field_Binary inside a Group_Field_Binary for tabulated spectra with groups. The sp:bin_center_field_name attribute must correspond to the name of exactly one Field_Delimited in the referenced Table_Delimited object. The sp:bin_center_field_name attribute must correspond to the name of exactly one Field_Delimited inside a Group_Field_Delimited for tabulated spectra with groups. For Tabulated-Flat spectra, every value of sp:bin_center_field_number_list must correspond to the value of a field_number attribute in a Field_Character definition. For Tabulated-Flat spectra, every value of sp:bin_center_field_number_list must correspond to the value of a field_number attribute in a Field_Binary definition. For Tabulated-Flat spectra, every value of sp:bin_center_field_number_list must correspond to the value of a field_number attribute in a Field_Delimited definition. In sp:Bin_Energy, bin_sequence_numbers must be between 1 and the number of bins, inclusive. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. In sp:Bin_Frequency, bin_sequence_numbers must be between 1 and the number of bins, inclusive. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. In sp:Bin_Wavelength, bin_sequence_numbers must be between 1 and the number of bins, inclusive. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. In sp:Bin_Wavenumber, bin_sequence_numbers must be between 1 and the number of bins, inclusive. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. In sp:Bin_Width_Constant, sp:bin_width_energy must be supplied for energy spectra. In sp:Bin_Width_Constant, sp:bin_width_frequency must be supplied for frequency spectra. In sp:Bin_Width_Constant, sp:bin_width_wavelength must be supplied for wavelength spectra. In sp:Bin_Width_Constant, sp:bin_width_wavenumber must be supplied for wavenumber spectra. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. In sp:Bin_Width_Lookup, exactly one of sp:bin_width_field_name, sp:bin_width_field_number_list, pds:Local_Identifier_Reference, or pds:Internal_Reference must be provided. The attribute sp:Bin_Width_Lookup/pds:Internal_Reference/pds:reference_type must be equal to the value 'spectral_characteristics_to_bin_width_values'. The attribute sp:Bin_Width_Lookup/pds:Local_Internal_Reference/pds:local_reference_type must be equal to the value 'spectral_characteristics_to_bin_width_values'. The sp:bin_width_field_name attribute must correspond to the name of exactly Field_Character in the referenced Table_Character object. The sp:bin_width_field_name attribute must correspond to the name of exactly one Field_Character inside a Group_Field_Character for tabulated spectra with groups. The sp:bin_width_field_name attribute must correspond to the name of exactly one Field_Binary in the referenced Table_Binary object. The sp:bin_width_field_name attribute must correspond to the name of exactly one Field_Binary inside a Group_Field_Binary for tabulated spectra with groups. The sp:bin_width_field_name attribute must correspond to the name of exactly one Field_Delimited in the referenced Table_Delimited object. The sp:bin_width_field_name attribute must correspond to the name of exactly one Field_Delimited inside a Group_Field_Delimited for tabulated spectra with groups. For Tabulated-Flat spectra, every value of sp:bin_width_field_number_list must correspond to the value of a field_number attribute in a Field_Character definition. For Tabulated-Flat spectra, every value of sp:bin_width_field_number_list must correspond to the value of a field_number attribute in a Field_Binary definition. For Tabulated-Flat spectra, every value of sp:bin_width_field_number_list must correspond to the value of a field_number attribute in a Field_Delimited definition. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute sp:Field_of_View/pds:Internal_Reference/pds:reference_type must be equal to the value 'spectral_characteristics_to_document'. In sp:Observation_Parameters, only sp:resolution_limit_energy may be included for energy spectra. In sp:Observation_Parameters, only sp:resolution_limit_frequency may be included for frequency spectra. In sp:Observation_Parameters, only sp:resolution_limit_wavelength may be included for wavelength spectra. In sp:Observation_Parameters, only sp:resolution_limit_wavenumber may be included for wavenumber spectra. The attribute @unit must be equal to one of the following values 'day', 'hr', 'julian day', 'microseconds', 'min', 'ms', 'ns', 's', 'yr'. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The attribute @unit must be equal to one of the following values 'arcmin', 'arcsec', 'deg', 'hr', 'microrad', 'mrad', 'rad'. The Array-type object referenced by sp:Spectral_Characteristics must be either an Array_1D_Spectrum, Array_2D_Spectrum, or an Array_3D_Spectrum. In sp:Spectral_Characteristics must reference either a Table_Character, Table_Binary, or Table_Delimited object when pds:local_reference_type is 'spectral_characteristics_to_table_object'. The attribute sp:Spectral_Characteristics/pds:Local_Internal_Reference/pds:local_reference_type must be equal to one of the following values 'spectral_characteristics_to_array_object', 'spectral_characteristics_to_table_object'. The attribute sp:Spectral_Characteristics/sp:spectral_bin_type must be equal to one of the following values 'energy', 'frequency', 'wavelength', 'wavenumber'. sp:spectrum_format of 'Tabulated-Flat' must be used with a table-type object. sp:spectrum_format of 'Tabulated-Parameter Groups' must be used with a table-type object. sp:spectrum_format of 'Tabulated-Point Group' must be used with a table-type object. sp:spectrum_format of '1D' must be used with an Array_1D_Spectrum-type object or a table-type object. sp:spectrum_format of '2D' must be used with an Array_2D_Spectrum-type object. sp:spectrum_format of '3D' must be used with an Array_3D_Spectrum-type object. sp:value_field_name is required when sp:spectrum_format is 'Tabulated-Parameter Groups', 'Tabulated-Point Group', or '1D' with an associated table object, and prohibited otherwise. The sp:value_field_number_list attribute is required, and may only be used, when sp:spectrum_format is 'Tabulated-Flat'. The attribute sp:Spectral_Characteristics/sp:spectrum_format must be equal to one of the following values '1D', '2D', '3D', 'Tabulated-Flat', 'Tabulated-Parameter Groups', 'Tabulated-Point Group'. The sp:value_field_name attribute must correspond to the name of exactly one Field_Character in the referenced Table_Character object. The sp:value_field_name attribute must correspond to the name of exactly one Field_Character inside a Group_Field_Character for tabulated spectra with groups. The sp:value_field_name attribute must correspond to the name of exactly one Field_Binary in the referenced Table_Binary object. The sp:value_field_name attribute must correspond to the name of exactly one Field_Binary inside a Group_Field_Binary for tabulated spectra with groups. The sp:value_field_name attribute must correspond to the name of exactly one Field_Delimited in the referenced Table_Delimited object. The sp:value_field_name attribute must correspond to the name of exactly one Field_Delimited inside a Group_Field_Delimited for tabulated spectra with groups. For Tabulated-Flat spectra, every value of sp:value_field_number_list must correspond to the value of a field_number attribute in a Field_Character definition. For Tabulated-Flat spectra, every value of sp:value_field_number_list must correspond to the value of a field_number attribute in a Field_Binary definition. For Tabulated-Flat spectra, every value of sp:value_field_number_list must correspond to the value of a field_number attribute in a Field_Delimited definition. In sp:Spectral_Lookup, sp:bin_center_field_name and sp:bin_width_field_name may not have the same value. The sp:Uniformaly_Sampled_Energy may only be used when sp:spectral_bin_type is "energy". If the referenced object is an array, then sp:axis_name must correspond to the name attribute of one of the Array_Axis classes in that array object. Specify "Row" for a spectral table to indicate that the rows constitute uniformly sampled bins. Specify "Field" to indicate that each row contains a complete spectrum and the fields constitute uniformly sample bins. The sp:sampling_base attribute is forbidden if sp:sampling_scale is "Linear". The sp:sampling_base attribute is required for non-Linear sampling scales. In the Uniformly_Sampled classes, the first_center and last_center values must have the same units of measure. In the Uniformly_Sampled classes, the first_center value must be less than the last_center value. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. The attribute @unit must be equal to one of the following values 'J', 'MeV', 'eV', 'keV'. The attribute sp:Uniformly_Sampled_Energy/sp:sampling_scale must be equal to one of the following values 'Linear', 'Logarithmic'. The sp:Uniformaly_Sampled_Frequency may only be used when sp:spectral_bin_type is "frequency". If the referenced object is an array, then sp:axis_name must correspond to the name attribute of one of the Array_Axis classes in that array object. Specify "Row" for a spectral table to indicate that the rows constitute uniformly sampled bins. Specify "Field" to indicate that each row contains a complete spectrum and the fields constitute uniformly sample bins. The sp:sampling_base attribute is forbidden if sp:sampling_scale is "Linear". The sp:sampling_base attribute is required for non-Linear sampling scales. In the Uniformly_Sampled classes, the first_center and last_center values must have the same units of measure. In the Uniformly_Sampled classes, the first_center value must be less than the last_center value. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. The attribute @unit must be equal to one of the following values 'GHz', 'Hz', 'MHz', 'THz', 'kHz', 'mHz'. The attribute sp:Uniformly_Sampled_Frequency/sp:sampling_scale must be equal to one of the following values 'Linear', 'Logarithmic'. The sp:Uniformaly_Sampled_Wavelength may only be used when sp:spectral_bin_type is "wavelength". If the referenced object is an array, then sp:axis_name must correspond to the name attribute of one of the Array_Axis classes in that array object. Specify "Row" for a spectral table to indicate that the rows constitute uniformly sampled bins. Specify "Field" to indicate that each row contains a complete spectrum and the fields constitute uniformly sample bins. The sp:sampling_base attribute is forbidden if sp:sampling_scale is "Linear". The sp:sampling_base attribute is required for non-Linear sampling scales. In the Uniformly_Sampled classes, the first_center and last_center values must have the same units of measure. In the Uniformly_Sampled classes, the first_center value must be less than the last_center value. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. The attribute @unit must be equal to one of the following values 'AU', 'Angstrom', 'cm', 'km', 'm', 'micrometer', 'mm', 'nm'. The attribute sp:Uniformly_Sampled_Wavelength/sp:sampling_scale must be equal to one of the following values 'Linear', 'Logarithmic'. The sp:Uniformaly_Sampled_Wavenumber may only be used when sp:spectral_bin_type is "wavenumber". If the referenced object is an array, then sp:axis_name must correspond to the name attribute of one of the Array_Axis classes in that array object. Specify "Row" for a spectral table to indicate that the rows constitute uniformly sampled bins. Specify "Field" to indicate that each row contains a complete spectrum and the fields constitute uniformly sample bins. The sp:sampling_base attribute is forbidden if sp:sampling_scale is "Linear". The sp:sampling_base attribute is required for non-Linear sampling scales. In the Uniformly_Sampled classes, the first_center and last_center values must have the same units of measure. In the Uniformly_Sampled classes, the first_center value must be less than the last_center value. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. The attribute @unit must be equal to one of the following values '1/cm', '1/m', '1/nm', 'cm**-1', 'm**-1', 'nm**-1'. The attribute sp:Uniformly_Sampled_Wavenumber/sp:sampling_scale must be equal to one of the following values 'Linear', 'Logarithmic'.