Hi Nicklas, base-developpers,

Dominic an myself are currently working on a 
MAGE-TAB*(http://www.mged.org/mage-tab/) importer for BASE2.
The format allows specifying Units to qualify descriptors such as 
protocol parameter, experimental factors, biomaterial descriptors.
I can be quite handy for instance when having to report doses ranges of 
various compound fed to animals.
When trying to get the unit information in BASE2, we are facing the 
following:
Essentially, in order to retain unit information, we have to 'squeeze 
the information in an Annotation Type of type string that will get the 
numerical value + the unit value represented in the MAGE-TAB document.

Several drawbacks in using this mechanism in BASE2
- loss of data type
- loss of data validation capability offered by BASE2 Annotation Type
- loss of computation (using BASE formulas for instance) over numerical 
Annotation types.

The other option of creation several Annotation Type of type float with 
different labels to reflect unit changes, has serious User friendlyness 
issues.

Are there any plans to provide a support for units in BASE2 Annotation 
Type, and if so on which timeline ?

Is it a viable options to alter Float Value and Integer Value for 
Annotation Type in BASE2 to allow for specification of units (possibly 
as free text in a first go) ?
(I reckon this would requires changes to the interface..)

Are we the only BASE2 users confronted with this units/annotation type 
pb and would there people out there interested in developing this 
feature and contribute it to BASE2 ?

Thanks for your input.

Philippe







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