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I would like to place a unit of a attribute with integer/decimal values somewhere. It can be generalized to suffix of attribute value.
Length attribute - value 10, suffix/unit: mm
instead of value: “10 mm”
It would have this advantage over storing values like string that values can be processed as numbers and measure of unit can be converted form one to another (Zend Framework has this feature in Zend_Measure).
If you want to search by decimal attributes, such as length, width, etc with prefixes you can use Improved Navigation extension and create sliders for such attributes. From-To inputs or ranges (1-99) are also available.