title: What is a good open source framework to generate ASP.NET form-based editing of an XML file?
body: <p>I'm currently pondering my options for the following problem:</p>
  
  <p>I have a (relatively) simple but often changing configuration file for my application which I want users to be able to edit and change without have to "understand" xml. I do not want them to have know anything about encoding or understand that they have to close every node they opened. Here is an example of a section in the configuration file (defining facets for some arbitrary search engine):</p>
  
  <pre><code>   &lt;section name="facets"&gt;
        &lt;facet type="format" label="Format" max="4"/&gt;
        &lt;facet type="marcfields" Label="Author" max="5"&gt;
           &lt;mfield name="df100" subfields="abcdjq"/&gt;
        &lt;/facet&gt;
        &lt;facet type="language" max="4"/&gt;
        &lt;facet type="pubdate" max="6" submax="8"/&gt; 
     &lt;/section&gt;
  </code></pre>
  
  <p>Editing this section, user should should be able to re-order the facets, delete facets, configure existing facets or add new ones. So far so good, but the xml is not completely free form and comes with a couple of restriction/structure:</p>
  
  <ul>
  <li>Facets come from a pre-defined set of
  types (forkamt, marcields, language &amp;
  pubdate above), so when people choose
  to add a new one, they need to be
  able to choose a type.  </li>
  <li>Each facet type comes with "parameters" - some common for all types some specific. For example in the above XML, one can edit the label &amp; max attribute for each facet. For the "marcfields"facet, one can add sub-nodes (with two editable attributes). For the"pubdate" facet, one can edit the submax attribute.</li>
  </ul>
  
  <p>I am looking for a way to take my configuration file and make it editable in ASP.NET web environment. All of this would be fine to program, but I except the configuration file to change often and I don't want to have to recode my site for every change. Therefore I'm looking for an open source frame work which can:</p>
  
  <ul>
  <li>Take an XML file with a known structure and constraint (via an XML schema or anything else).</li>
  <li>Generate a ASP.NET based editing environment , allowing people to safely manipulate the xml file.</li>
  <li>Be very friendly where people make mistakes.</li>
  </ul>
  
  <p>Any suggestions?</p>