Subfield $w/0-r - Relationship designation in subfield $i or $4:  [4XX and 5XX:  Tracing Fields - Simple Cross References]

Code r is used in conjunction with subfield $i (Relationship information) or $4 (Relationship).  Guidelines for applying code i are given under the description of subfield $i.

Examples:

110  2#  $aI.M. Pei & Partners

500  1#  $wr$ifounder$aPei, I. M.$d1917-

510  1#  $wb$aPei Cobb Freed & Partners

Cross reference display example:

I.M. Pei, 1917-

See also founded organization:  I.M. Pei & Partners

Pei Cobb Freed & Partners

See also earlier name:  I.M. Pei & Partners

100  1#  $aPei, I. M.$d1917-

510  2#  $wr$ifounder of$aI.M. Pei & Partners.

Cross reference display example:

I.M. Pei & Partners

See also founder I. M. Pei, 1917-

100  1#  $aStoppard, Tom.$tRosencrantz and Guildenstern are dead

500  1#  $wr$ibased on (work)$aShakespeare, William,$d1564-1616$tHamlet

Cross reference display example:

Shakespeare, William, 1564-1616. Hamlet

Derivative work: Stoppard, Tom. Rosencrantz and Guildenstern are dead