854 CAPTIONS AND PATTERN--SUPPLEMENTARY MATERIAL (R)
Indicators First Compressability and expandability 0 Cannot compress or expand 1 Can compress but not expand 2 Can compress or expand 3 Unknown Second Caption evaluation 0 Captions verified; all levels present 1 Captions verified; all levels may not be present 2 Captions unverified; all levels present 3 Captions unverified; all levels may not be present
Subfield Codes $a First level of enumeration (NR) $b Second level of enumeration (NR) $c Third level of enumeration (NR) $d Fourth level of enumeration (NR) $e Fifth level of enumeration (NR) $f Sixth level of enumeration (NR) $g Alternative numbering scheme, first level of enumeration (NR) $h Alternative numbering scheme, second level of enumeration (NR) $i First level of chronology (NR) $j Second level of chronology (NR) $k Third level of chronology (NR) $l Fourth level of chronology (NR) $m Alternative numbering scheme, chronology (NR) $o Type of supplementary material (NR) $t Copy (NR) $u Bibliographic units per next higher level (R) $v Numbering continuity (R) $w Frequency (NR) $x Calendar change (NR) $y Regularity pattern (NR) $3 Materials specified (NR) $8 Link and sequence number (NR)