. . "The recommended best practice is to separate the values with a vertical bar (' | '). Examples: \"FMNH:Mammal:1234\", \"NPS YELLO6778 | MBG 33424\"."@en . . "A list (concatenated and separated) of previous or alternate fully qualified catalog numbers or other human-used identifiers for the same Occurrence, whether in the current or any other data set or collection."@en . . "2008-11-19" . "recommended" . "2014-10-23" . "DataSets/DataSet/Units/Unit/SpecimenUnit/History/PreviousUnitsText" . "Other Catalog Numbers"@en . . .