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tDAR includes five separate column types:
- Numeric value - a numeric value, such as an ID number count, or measurement that stands on its own
- Text value - a text value that stands on its own, such as a provenience label, a comment or a variable state (e.g. "jar") that is entered n a textual form (note that in databases, text values are case sensitive so "jar" is not the same as "Jar".)
- Coded value - values numeric or text codes that use a coding sheet to translate to a human-readable value label (if you mark a column as having a coded value, tDAR will prompt you to select the coding sheet)
- Measurement - column contains litres, pounds, inches, etc
- Count - the value is a number but represents a count of some other column
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