Tag: rule of three

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Les cités magiques / Jean-Michel Angebert. (OCLC #1503805)

This book describes seven magic cities, whose names are not in the title of the book. We would also not generally include all of them as subject headings, because of the rule of three; they are summarized by the single heading:

650 _0 ǂa Cities and towns ǂv Miscellanea.

For subject access by individual cities, our best bet is to count on keyword access via the contents note:

505 0_ ǂa Thèbes, cité royale -- Jérusalem, cité sainte -- Rome, la
    ville éternelle -- Prague, la ville aux cent tours -- Machu-Pichu,
    la cité perdue des Andes -- Bénarès, la ville sacrée -- Lhassa et
    son double : Schamballah.
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Surrender or starve : travels in Sudan, Eritrea, Somalia, and Ethiopia / Robert D. Kaplan. (OCLC #52381251)

Though this title is about four different countries, there are more than three of them, so by the rule of three, we include only their broader geographic subject heading:

651 _0 ǂa Africa, Northeast ǂx Description and travel.

The names of the countries are in the title; as they are available from a keyword search, not much subject access is lost by not also including them as subjects.

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Los reyes del Grial / Margarita Torres Sevilla, José Miguel Ortega del Río ; edición de María Robledano. (OCLC #878689024)

Only the first statement of responsibility is core in RDA, so we could have chosen to omit “edición de María Robledano”.

A statement of responsibility listing more than one person (such as “Margarita Torres Sevilla, José Miguel Ortega del Río”) is recorded as a single statement. There is an optional omission rule which says that if a statement includes more than three (!) people, you may omit some of them and record a summarized version, such as:

edited by Bob Smith, Jon Jones [and two others]

Both LC-PCC PS and NLA PS say to generally not omit names.

When recording relationships between people and resources (for example, via main or added entries in a MARC record), only the first creator (or someone used to create the AAP) is required; I chose to record the relationship for the second creator (in a 700) as well.