The SEC proposal in question is talking about making these available (publicly if I read this correctly) when defining new securities:
> We also are proposing to require that, with some exceptions, prospectuses for public offerings of asset-backed securities and ongoing Exchange Act reports contain specified asset-level information about each of the assets in the pool. The asset-level information would be provided according to proposed standards and in a tagged data format using eXtensible Markup Language (XML). In addition, we are proposing to require, along with the prospectus filing, the filing of a computer program of the contractual cash flow provisions expressed as downloadable source code in Python...
> We also are proposing to require that, with some exceptions, prospectuses for public offerings of asset-backed securities and ongoing Exchange Act reports contain specified asset-level information about each of the assets in the pool. The asset-level information would be provided according to proposed standards and in a tagged data format using eXtensible Markup Language (XML). In addition, we are proposing to require, along with the prospectus filing, the filing of a computer program of the contractual cash flow provisions expressed as downloadable source code in Python...
http://www.sec.gov/rules/proposed/2010/33-9117.pdf