Bob MacCallum wrote:
> Hello all,
> 
> No it's not a new standard we have to adhere to (MIAD), I am wondering what is
> the least amount of array design information I can give to BASE if I want to
> load "hacked" data in from a non-supported platform (or from already processed
> data) but still maintain the raw bioassay<->array design<->reporter links.
> 
> I'm talking about making a fake array design with some made-up
> position/coordinate data, and adding this to the "raw" data files.  Sounds
> nasty I know.
> 
> What can I get away with, just "position" or "position + X + Y"?  Given some
> recent developments in the schema and no indications in the main
> documentation, I would appreciate some guidance.

There are three options that are described by a 
FeatureIdentificationMethod object (see 
http://base.thep.lu.se/chrome/site/latest/api/net/sf/basedb/core/FeatureBatcher.html).

The first option is to use coordinates, which can be either:[block, row, 
column] or [metaGridX, metaGridY, row, column]. I think this alternative 
is the least usable when "faking" an array design, but is the only 
alternative before BASE 2.6.

The second option is to use position only. It must be an integer > 0. 
The position existed before BASE 2.6 but it was always assigned 
internally by BASE. With BASE 2.6 or later the position can be assigned 
by the import plug-in.

The third option is to use a "featureId" which is a string value. This 
is completely new for BASE 2.6 and is the method used by the Illumina 
plug-ins package: http://baseplugins.thep.lu.se/wiki/net.sf.basedb.illumina

In all three cases the given value(s) must be unique within an array design.

There is a forth option to keep everything in files and not in the 
database, but if you want to do anything with that kind of data you'll 
need to write plug-ins that knows how to extract information from the 
files. This is the approach used with Affymetrix data (CEL and CDF files).

/Nicklas


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