Representative records: representative records
收藏资源简介:
exemplary records to represent a single typical value of an attribute for a taxon. This resource lists existing records that are tagged in the database as representative (REP) and/or primary (PRM) records. Records for adult lifestages are preferred where appropriate (eg, for body size) and measures of central tendency are preferred (eg: mean, median). Multiple records with similar metadata may be selected as Representative (REP) records. A record from the middle of a numerical value range is also tagged as the Primary (PRM) record. For instance, a plant with height records (all for mature plants and representing the mean of a dataset) of 60cm, 79cm, and 1m will have a PRM record of 79 cm. Categorical values are summarized by superclass (umbrella) categories. A species reported from Brazil, Venezuela, and Argentina will have a PRM record for South America.
本数据集收录用于代表某一分类群(taxon)某一属性的单一典型值的示范记录。 本数据集收录数据库中被标记为代表性(REP)记录和/或主要(PRM)记录的现有条目。在适宜场景下(例如体型相关属性),优先选用成体阶段的记录;同时优先选取集中趋势度量值(measures of central tendency),例如均值、中位数。若存在多条元数据(metadata)相似的记录,可选取其中若干作为代表性(REP)记录。处于数值区间中间位置的记录也会被标记为主要(PRM)记录。例如,某植物的株高记录均来自成熟植株且代表数据集均值,取值分别为60cm、79cm与1m,则其主要(PRM)记录为79cm。分类属性值将通过上位总括类别进行归纳汇总。某物种的分布记录涉及巴西、委内瑞拉与阿根廷,则其主要(PRM)记录将标记为南美洲。



