Development of 'Web-centric' Applications

Acknowledging the principles of Web Enabled Applications, even at a basic level (ECMAScript: query strings), Information Technology and cost-effective computer applications, the approach of client / server architecture, peer-to-peer communication. Speculative, the introduction of a 'two-tier architecture', in which 'client – side software requests information from the user – formatting the request into a query which in turn is sent over the network to the database server for processing.

HTML4.0, ECMAScript, XML*(various parsers), Perl (variants) and Oracle10g (Sql);

if I am able to find a successful parser, and an original installPak of perl which works without daft variants..