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Only for certain subfields: Dash (-) that precedes a subdivision in an extended 600 subject heading is not carried in the MARC record. It may be system generated as a display constant associated with the content of subfield $v, $x, $y, and $z. From http://www.loc.gov/marc/bibliographic/bd600.html -Tod On Sep 23, 2009, at 9:09 AM, Jonathan Rochkind wrote: > Hi all, I'm writing some marc record display code, and I have a > question about the 'right' way to display LCSH headings. > > LCSH headings are typically displayed with "--" between components. > But looking at the MARC, it looks like the "--" punctuation isn't > actually in the MARC field. (A rare instance where display > punctuation isn't in the marc!). > > Is it correct for any LCSH 6xx field (which you know because the 2nd > indicator is 0, right?), to add "--" between ALL present subfields > on display? Do I have the right logic there? > > Thanks for any advice! > > Jonathan