Apex programming language

Hi to everybody,
in which programming language is Apex written?
Thanks.
Cheers,
Eugenio

user1342238 wrote:
Hi and thanks for your replies.
just pl/sql? But when I call a page with my browser http://127.0.0.1:8080/apex I'm actually using a Web application...isn't there something written in a lower-level language which answers to me?
I didn't thing it was possible to write a Web app using jsut pl/sql.
Shows you how powerful PL/SQL actually is, doesn't it.
Application Express itself is written in 'Application Express'. It's basis is the following connection stream: Browser <-> HTTP Server <-> Database <-> PL/SQL packages. The core to APEX is some pretty intelligent PL/SQL code. (It could have been Java code as well, but that would break on XE.) Wrapped up as a set of APEX-specific packages. Some of twhich are documented in the "Oracle® Database PL/SQL Packages and Types Reference" at http://download.oracle.com/docs/cd/B28359_01/appdev.111/b28419/toc.htm
For many years the HTTP Server to Database connection was accomplished using mod_plsql. Oracle Database 10gR2 Express Edition officially announced the ability to connect from Browser to Database (via DB Listener) and the HTTP service that responds to the user is implemented in DBMS_XDB.
For years, Oracle database has supported UTL_HTP to permit the 'database' to write HTTP response messages. (It also supports UTL_FILE, UTL_TCP, UTL_SMTP, and so on)
For years, the Oracle database has been able to store and retrieve multi-media files, such as JPEG, GIF, and even Flash.
For years, Oracle has supported the WebDAV spec in it's OraDAV implementation, allowing mukti-protocol access to database tables and columns.
For years, Oracle database (and indeed almost all Oracle products) have had extensive support for XML.
So it is quite reasonable for APEX to be totally inside the database written in SQL, PL/SQL. Advanced capabilities, such as CSS and so on, are accessible in many different ways.

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