free ebook and tutorial-PHP Integration with object relational DBMS

The definition and properties of an API between Amos II and PHP are the main topic soft his report. Amos II (Active Mediator Object System)is an extensible functional multidatabase system[1]. Functional queries, expressed in AmosQL, can be executed by one database or over a federation of distributed databases. AmosQL is a query language similar to the OOparts of SQL-99. Further more Amos II can be set up as a stand alone main-memory object-relational DBMS.
Two kinds of interfaces are offered between Amos II and the programming languages C[5] or Java[6], the call in interface and the call out interface. To call Amos II from an application the call in interface can be used. Establishing connections, sending queries and dealing with result sets are tasks of this interface. Contrary the call out interface is able to call external functions from C or Java. Once known to Amos II, these external functions can be used in AmosQL queries. The call in and call out interfaces permit the development of wrappers. Wrappers are small program modules that can access external data, for example XML documents, relational databases, webforms, MIDI files and web browsers.

download