What are .1vc sound patches ?

[quakig]

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Planning to buy a breath controller and am researching them. In that context, I came across this sound patches with .1vc extension.
http://windsynth.net/advanced.html (http://windsynth.net/advanced.html)

What are these and how do we use them ?

[BertKoor]

I googled "patch 1vc" and this came up:
http://www.kbspace.com/vl1m/patches/
These seem to be specific for Yamaha VL1 or VL7 synths.