Schematron using XPath 2.0 In the nucspec:Applicable_Records class, the local_identifier_reference () must reference a table with a record count. In the nucspec:Calibration_Reference class, the attribute pds:reference_type must be equal to 'energy_calibration_to_calibration_document'. In the nucspec:First_Count class, the index of the last record () must be less than or equal to the record count of the referenced table (). In the nucspec:First_Last class, the index of the last record must be greater than or equal to the index of the first record. In the nucspec:First_Last class, the index of the last record () must be less than or equal to the record count of the referenced table (). In the nucspec:Observing_Condition class, condition_source and/or condition_active must be specified. The attribute nucspec:Observing_Conditions/nucspec:condition_type must be nulled or equal to one of the following values 'Data Glitch', 'Electron Burst', 'Gamma-ray Burst', 'SEP', 'Solar Flare'. In the nucspec:State_Table class, the attribute pds:reference_type must be equal to 'nucspec_product_to_state_table'. In the nucspec:State_Table class, the attribute pds:local_reference_type must be equal to 'state_table_to_data_table'. In the nucspec:State_Table class, the class pds:Local_Internal_Reference must contain only a single pds:local_identifier_reference. In the nucspec:State_Table_Entry class, the local_identifier_reference () must reference a table. In the nucspec:State_Time class, state_time_field_name () must reference a field in the referenced data table (). 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 'day', 'hr', 'julian day', 'microseconds', 'min', 'ms', 'ns', 's', 'yr'.