Extract job data from existing websites

I am unsure of the correct terminology, or if this can even be done, but I would like job data extracted from the following job sites and copied into a new database for use within [login to view URL] (another project on GAF refers to this). [login to view URL] [login to view URL] [login to view URL] [login to view URL] This must be updateable (additonal search criteria?) and run automatically (CRON job?) Can you please supply, via PMB, your understanding of this project so that I can compare my thoughts with what is actually possible! Many thanks