<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Extensibility</title><link rel="stylesheet" href="./mystyle.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.68.1"><link rel="home" href="index.html" title="IMS-LD: Integration with .LRN Specification (v 1.1)"><link rel="up" href="ch01.html" title="Chapter�1.�Introduction"><link rel="previous" href="ch01s05.html" title="Competitive Analysis"><link rel="next" href="ch01s07.html" title="User Requirements"><script language="javascript" type="text/javascript">
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</script></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Extensibility</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch01s05.html">Prev</a>�</td><th width="60%" align="center">Chapter�1.�Introduction</th><td width="20%" align="right">�<a accesskey="n" href="ch01s07.html">Next</a></td></tr></table><hr></div><div class="section" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="id2528018"></a>Extensibility</h2></div></div></div><p>The .LRN implementation must be easily extensible. The IMS-LD
specification may change in the future, so the .LRN implementation has to
be done taking that into account. The .LRN implementation must be so
flexible in order to adapt to the possible changes of the IMS-LD
specification. This means that if a change is produced in IMS-LD
specification, then this should imply only minor changes in our .LRN
implementation of IMS-LD. Also, if the initial specification should be
extended it should be done in an easy way.</p><p>Reusability and standards</p><p>The implementation must follow, as much as possible, the standards
defined by the IMS Global Learning Consortium. For example for the
compatibility problem that was mentioned before, there should be an easy
way to modify which .LRN service performs which IMS-LD service, and also
to add a new type of IMS-LD service and the corresponding .LRN service
that will be in charge of dealing with it.</p><p>Our XML parser has to be aware of this flexibility, being easy to
modify according to the, probably often, changes or improvements in the
specification. The mapping between the service types and its corresponding
.LRN services can be easily edited via web. Everything that can possibly
change in the near future, must be easily extensible as this was mentioned
in the previous section</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ch01s05.html">Prev</a>�</td><td width="20%" align="center"><a accesskey="u" href="ch01.html">Up</a></td><td width="40%" align="right">�<a accesskey="n" href="ch01s07.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Competitive Analysis�</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">�User Requirements</td></tr></table></div></body></html>