552 ENTITY AND ATTRIBUTE INFORMATION NOTE (R)
Indicators - Both undefined; each contains a blank (^)
Subfield Codes
$a Entity type label (NR)
$b Entity type definition and source (NR)
$c Attribute label (NR)
$d Attribute definition and source (NR)
$e Enumerated domain value (R)
$f Enumerated domain value definition and source (R)
$g Range domain minimum and maximum (NR)
$h Codeset name and source (NR)
$i Unrepresentable domain (NR)
$j Attribute units of measurement and resolution (NR)
$k Beginning date and ending date of attribute values (NR)
$l Attribute value accuracy (NR)
$m Attribute value accuracy explanation (NR)
$n Attribute measurement frequency (NR)
$o Entity and attribute overview (R)
$p Entity and attribute detail citation (R)
$u Uniform Resource Identifier (R)
$6 Linkage (NR)
$8 Field link and sequence number (R)