On Thu, Dec 12, 2013 at 6:18 PM, Largo84 <[email protected]> wrote:

> The convention is that the file name is the same between the sidecar file
> and the raw image file.



A big difference between images-with-side-car files and text files, like
program code for example, is that images and .xmp mostly have a one-to-one
relationship while arbitrary text files often won't.  For a metaphor, think
what it would be like managing the files if every frame in video had it's
own .xmp side car, e.g. a single .leo file with multiple @file nodes.

In the GIS world, which has many data formats utilizing multiple files to
represent a single data-set (e.g. shapefile), we often struggle re-piecing
data together because somewhere along the line someone dropped a side-car
that didn't immediately make the data-set unusable. For example a .shp file
without an accompanying coordinate system description (.prj) will work just
fine for years in it's originating office, but hand it off to a colleague
and they start complaining about stuff being in the wrong country and
hemisphere.

Anyway, side-cars *do* work. The aforementioned shapefile for example is
still the defacto interchange format for spatial data decades after it's
inception in spite of it's many limitations, the side-car nature being one
of them. It's just that there are side effects to consider.

-matt

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