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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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>libdbi Concepts and Terminology</TITLE
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>1.2. libdbi Concepts and Terminology</A
></H1
><P
>In this guide, the terms <SPAN
CLASS="QUOTE"
>"user"</SPAN
> and <SPAN
CLASS="QUOTE"
>"programmer"</SPAN
> are used interchangably, since the target audience is the software developer using libdbi in his	program. A star character (*) represents a wildcard matching any letters. For example, <SPAN
CLASS="QUOTE"
>"dbi_conn_*"</SPAN
> would represent all functions beginning with <SPAN
CLASS="QUOTE"
>"dbi_conn_"</SPAN
>.</P
><P
>Before doing anything useful, your program must initialize libdbi. This creates an <SPAN
CLASS="QUOTE"
>"instance"</SPAN
> of libdbi which is accessible through a handle. The libdbi architecture provides several <SPAN
CLASS="QUOTE"
>"drivers"</SPAN
>, one for each type of database server. All drivers are loaded into memory by each libdbi instance upon initialization and are made available to the programmer. Once a driver is <EM
>instantiated</EM
>, it represents a distinct database session and is called a <SPAN
CLASS="QUOTE"
>"connection"</SPAN
>.</P
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