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- Apply the distributive law to units e.g. 21 x 16mm becomes 21 mm x 16 mm
- When the type of extent is not provided, e.g. 17"X9", use "L." for the first, "W." for the second, and leave the remaining extents blank. Indicate "medium confidence" (i.e. 2) for rows with these empty extents. Ergo, 17"X9" becomes "L. 17 in. ; W. 9 in..
- Numeric ranges (e.g. 6.5-7.1) are retained as is, despite the fact that this makes it more challenging to convert these values to actual numeric data types.
- In cases where the dimensions are restated in different units, omit the second set of values (usually the English measures).
- " and ' can become in. and ft., respectively.
- The actual recognizer is considerably more complex than presented here: more units are recognized, and more patterns and variants are handled. Consult the perl script attached to understand the reality.
- Note that the values for unit (e.g. "cm") and dimension (e.g. "W") will need to be converted to their standard CSpace representation prior to uploading!