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<h3 class="section">28.4 Extending NSS</h3>
<p>One of the advantages of NSS mentioned above is that it can be extended
quite easily. There are two ways in which the extension can happen:
adding another database or adding another service. The former is
normally done only by the C library developers. It is
here only important to remember that adding another database is
independent from adding another service because a service need not
support all databases or lookup functions.
<p>A designer/implementor of a new service is therefore free to choose the
databases s/he is interested in and leave the rest for later (or
completely aside).
<ul class="menu">
<li><a accesskey="1" href="Adding-another-Service-to-NSS.html#Adding-another-Service-to-NSS">Adding another Service to NSS</a>: What is to do to add a new service.
<li><a accesskey="2" href="NSS-Module-Function-Internals.html#NSS-Module-Function-Internals">NSS Module Function Internals</a>: Guidelines for writing new NSS
service functions.
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