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Measurement Value [statistic(measurement name)]---The endpoint of the assay. Measurement value names are described in brackets or parenthesis if a statistics (e.g., mean, standard deviation) is applied to the measurement (Syntax:  Measurement Value[statistic(<measurement name>)]). A statistic is only required for statistical measures. This concept is introduced in ISA-TAB-Nano to capture measurement outputs recorded in summary data. (ISA-TAB Extension for ISA-TAB-Nano)

Qualifiers for Assay Nodes’ Attributes

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Unit---The standard of measurement used if the values for characteristic [ ], parameter value [ ], factor value [ ], or measurement value [ ] columns are quantitative and dimensional. If the term for unit is taken from an ontology/controlled vocabulary, then its term accession number and the term source REF should be defined in the ISA-TAB-Nano investigation file.Statistic---The type of statistical measure attributed to a numerical value (for example, mean, standard deviation, z-average, etc.). This is a required field, if the parameter value, factor value, or measurement value is a statistical measure.

Term Accession Number---Identification number of a term selected from an ontology or a controlled vocabulary, if the term is entered as a value in source name, material type, characteristic [ ], parameter value [ ], factor value [ ], measurement value [], unit, or statistic columns.

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