Borort

If you want to do cross-domain scripting with XMLHttpRequest, e.g. fetching data from a remote location but you’re on a local page or local XUL application (file:///), you need to tell Mozilla/Firefox about that, otherwise you get the infamous error:

Error: uncaught exception: Permission denied to call method XMLHttpRequest.open

Always remember: XMLHttpRequest needs UniversalBrowserRead!

If the page with the XMLHttpRequest is on a http:// URI (on a webserver), it is not possible to fetch data from another domain!!! This is a security measure of Mozilla/Firefox.

cross-domain-xmlhttprequest.html

<script type="text/javascript" language="javascript">

// Error: uncaught exception: Permission denied to call method XMLHttpRequest.open

  var http_request = false;

  function makeRequest(url, parameters) {

   try {
    netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
   } catch (e) {
    alert("Permission UniversalBrowserRead denied.");
   }

    http_request = false;
    http_request = new XMLHttpRequest();
    if (http_request.overrideMimeType) {
      http_request.overrideMimeType('text/xml');
    }
    if (!http_request) {
      alert('Cannot create XMLHTTP instance');
      return false;
    }
    http_request.onreadystatechange = alertContents;
    http_request.open('GET', url + parameters, true);
    http_request.send(null);
  }

  function alertContents() {
    if (http_request.readyState == 4) {
      if (http_request.status == 200) {

        var string = http_request.responseText;
      alert(string);

      } else {
        alert('There was a problem with the request.');
      }
    }
  }
  function updateweather() {
    makeRequest('http://www.wunderground.com/auto/rss_full/global/stations/16239.xml', '');
  }
</script>

<input type="button" name="button" value="GET XML"
  onclick="javascript:updateweather();">

Source: http://www.captain.at/howto-ajax-permission-denied-xmlhttprequest.php

Freebase Parallax: A new way to browse and explore data from David Huynh on Vimeo.

“Spiders” take a Web page’s content and create key search words that enable online users to find pages they’re looking for.

Source: http://computer.howstuffworks.com/search-engine1.htm

Research 8: A Browser for Heterogeneous Semantic Web Repositories
Michiel Hildebrand

ArchGenXML is a code-generator for CMF/Plone applications (Products) based on the Archetypes framework. It parses UML models in XMI-Format (.xmi, .zargo, .zuml), created with applications such as ArgoUML, Poseidon or ObjectDomain.

What is Archetypes?
Framework for developing Plone products
- Automatically creates view and edit pages
- Maintains unique object IDs
- Creates references between objects

Archetypes framework
Field validation
- Standard security setup
- Alternate storage options
- Data transformation capabilities

How to..(in Windows XP)

Before installing AGX, we need to have Plone install (Here my Plone version is 3.1.1).

Step 1: Download ArchGenXML from Plone website (Plone.org). The latest version of Plone requires the latest version of ArchGenXML which is available on SVN (Sub Version Control) repository: https://svn.plone.org/svn/archetypes/ArchGenXML/trunk/

Since i use the latest version of Plone so I need to download SGX from the SVN.

Step 2: Install SVN in order to download the repository. (http://tortoisesvn.net/downloads).

Step 3: Create a folder name “archGenXML” (in order to be easy to work with this i create it in C)

Step 4: Right Click on “archGenXML” folder > Click “SVN Checkout”. Enter the URL of SVN repository “https://svn.plone.org/svn/archetypes/ArchGenXML/trunk/” in URL of reposity field > Click OK. All the repository file and folder will be copied to your archGenXML folder.

Alternatively you can use command: svn co https://svn.plone.org/svn/archetypes/ArchGenXML/trunk/  from the command prompt to checkout the repository.

Step 5: Set up Path to “C:\Program Files\Plone 3\Python” and “C:\Program Files\Plone 3\Python\Scripts“ in PATH environment variable

Step 6: Go to command prompt: C:\archGenXML>python setup.py install

Step 7: Type: C:\>easy_install archgenxml

Step 8: Create a file name: .agx_zope_path (create this file using command prompt) in C:\archGenXML\src\archgenxml. Put one single line: “C:/Program Files/Plone 3/Zope/lib/Python” into the file.

Step 9: Install UML software. Here I use ArgoUML (http://argouml.tigris.org/)

Step 10: Create a simple UML model. 

Example: Make a new UML model and give it a name HelloWorld . Choose the tool for class creation and add a class to the diagram. Give it a name such as “HelloType” and add an attribute HelloText with type String.

Step 11: Save/export your model as an XMI file with the name MyFirstExample.xmi (You may save this file in drive C). Then go to the command line and execute: C:\>archgenxml MyFirstExample.xmi

ArchGenXML will begin code generation. When it completes, you will have a new folder HelloWorld on your file system

Step 12: Move the HelloWorld folder to: C:\Program Files\Plone 3\Data\Products. Restart Zope server and open Plone in a browser and log in as Admin. Choose Site Setup from the personal bar and choose Add-on Products. A new product HelloWorld should now appear in the list of products available for install. Choose it and click install. Go to your personal folder. In the list of addable items you’ll find the new product as an addable content type. Add a test instance to see if it works.

If you still have any problem please let me know..

Reference:
http://plone.org/documentation/manual/archgenxml2
http://www.jazkarta.com/presentations/ArchGenXML-UML-talk.pdf

Carrot² is an Open Source Search Results Clustering Engine. It can automatically organize (cluster) search results into thematic categories:

 Search results clustered with Carrot² (live demo)

Carrot² provides an architecture for acquiring search results from various sources (YahooAPI, GoogleAPI, MSN Search API, eTools Meta Search, Alexa Web Search, PubMed, OpenSearch, Lucene index, SOLR), clustering the results and visualising the clusters. Currently, 5 clustering algorithms are available that are suitable for different kinds of document clustering tasks.

Thanks to its flexible architecture, high quality and a friendly BSD-like license, Carrot² has been successfully used in a number of commercial and research applications and resulted in a number of interesting publications. To get started, please have a look at live demos and the downloads section. If you have any questions or comments about Carrot², please let us know.

For consulting services, installation, maintenance and text mining expertise, please contact the Carrot² spin-off company called Carrot Search. Carrot Search offers Lingo3G — the third generation high-performance document clustering engine featuring hierarchical clustering, ontologies, synonyms and advanced tuning capabilities.

Source: http://project.carrot2.org/index.html