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Imprecise Dates

Do not add imprecise dates (flourish dates or century dates) to headings unless they are needed to break a conflict with another heading (exception: never add a flourish or century date to a 20th cent. name, even to break a conflict).  Flourish dates that appear in reference sources carry more weight than flourish dates constructed by catalogers.  Prefer a range of flourish dates over a single flourish date whenever possible.  Always record flourish dates in 670 citations; they may be needed later to break a conflict.

Example 1: Flourish dates added to break conflict with another heading already established without dates:

010:  : |a nr 00034183
040:  : |a CtY-BR |b eng |c CtY-BR
100:1 : |a Lambert, Jean, |d fl. 1493-1514
400/1:1 : |a Lambert, Jehan, |d fl. 1493-1514
400/2:1 : |a Lambertus, Iohannes, |d fl. 1493-1514
400/3:1 : |a Lambertus, Johannes, |d fl. 1493-1514
670/1:  : |a Florij Francisci Flore[n]tini d'amore Camilli et Emilie retinorum, 150-?: |b t.p. (Jehan Lambert)
670/2:  : |a World biog. index (WWW), 24 Oct. 2000 |b (Lambert, Jean; fl. 1493-1514; bookseller and printer)
670/3:  : |a RLIN, 27 Oct. 2000 |b (hdg.: Lambert, Jean, fl. 1493-1515; usage: ... Iohannis Lamberti)
675:  : |a Dict. biog. fran.

010:  : |a n  95057095
040:  : |a DLC |c DLC |d DLC |d NIC-Mu |d DLC
100:10: |a Lambert, Jean
670/1:  : |a [Author of Pardonner]
670/2:  : |a Pardonner, 1994: |b t.p. (Jean Lambert) flap (anthropologue du CNRS)
670/3:  : |a [Author of La medecine de l'ame]
670/4:  : |a La medecine de l'ame, 1997: |b t.p. (Jean Lambert)
670/5:  : |a [Author of Droit du marche]
670/6:  : |a Droit du marche, 1993: |b t.p. (Jean Lambert; directeur dept. d'une adm. economique)

Example 2: Flourish date recorded in 670 but not added to heading because heading does not conflict:

010:  : |a nr 00031837
040:  : |a CtY-BR |b eng |c CtY-BR
100:1 : |a Roviglione, Giovanni Giacomo
400/1:1 : |a Roviglioni, Giacomo
400/2:0 : |a Inviato
670/1:  : |a Orationi et discorsi, 1595: |b t.p. (Sig. Giacomo Roviglioni academico detto l'Inviato)
670/2:  : |a Indice biog. ital |b (Roviglione, Giovanni Giacomo; fl. 1595; professor of letters)

N.B.  Because AACR2 and the LCRIs are not entirely clear on this matter, you may find that other catalogers routinely add imprecise dates to headings.  The Rare Book Team's practice is based on correspondence with CPSO and reflects the practice of the Library of Congress Rare Book Team.

NACO Records for Rare Materials

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This file last modified 08/01/2006
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