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><P
>The package manager knows the preferred location for packages (this
location is compiled in), which is usually
/usr/local/lib/ocaml/site-lib. You can ask the package manager where
package p is stored by simply typing</P
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>ocamlfind query p</PRE
><P
>and it will answer something like</P
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>/usr/local/lib/ocaml/site-lib/p</PRE
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>There is an environment variable OCAMLPATH which can specify further
directories where packages are stored. (The search order is: first
the directories in OCAMLPATH in turn, then the default path
set in ocamlfind.conf)</P
><P
>Historically, this kind of query was the first and only way of using
ocamlfind, and because of the similiarity to the Unix find command it
got its name. Finding out package locations is a basic but
nethertheless important feature because it hides the details of the
filesystem hierarchy. It is sufficient only to know the name of the
package, and if needed, you can use the lookup mechanism implemented
in ocamlfind to get the concrete directory.</P
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