Two Open Source front end proxy caches are Varnish and Squid.
Then you need to put some marshalling code atop that to provide an access layer to the front end.
HC does not deviate from this standard, but it USES a trick to simplify writing the front end.
This year, all new insurance plans will be required to offer free preventive care to their customers - so that we can start catching preventable illnesses and diseases on the front end.
In the previous sections of this chapter, we discussed the merits of attribute-based retrieval. This kind of a system, to be truly successful, requires a front end that allows users to very easily make sense of what could be quite complex and interrelated sets of attributes.
