Visualizing data redundancy

In one of my earlier blog entries I elaborated redundancy in federated information systems. The following picture illustrates such redundancy. Cluster map technology is used there to represent overlappings of entity attribute clusters. Each cluster represents entity attributes in an information system description. Overlapping areas represent entity attributes, which are potentially redundant, since they appear in several clusters at the same time.

xtee Redundancy Cluster

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written by Len, September 14, 2009

Very interesting post. How did you get this picture?

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written by Peep Küngas, September 17, 2009

The clusters were generated with inhouse analytics software, while Aduna Cluster Map (http://www.aduna-software.com/...clustermap) was used for visualization.

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written by Csaba Veres, September 17, 2009

So what are you going to do now Aduna pulled their open source license? I was about to use cluster maps for a project just as I discovered their terrible deed!!!!!

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written by Peep Küngas, September 18, 2009

All this happened fast... Which alternatives have you considered? BTW there are some quite nice open source topic map visualization tools available.

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written by Felix Felix, November 05, 2009

Hello Peep,

I came into your blog occassionally and found this article when searching on the net to find info about how to use Aduna Cluster Map to visaulize the cluster reuslts which are generated by using Carrot API.

I noticed that you said
"....
The clusters were generated with inhouse analytics software, while Aduna Cluster Map (http://www.aduna-software.com/...clustermap) was used for visualization. ..."

I wonder if Aduna Cluster Map has any special requirements on the input data,i.e., the cluster results. What attributes are necessary. Cluster label? anything esle?

The quesion of how to use Adunda Cluster Map has stuck me for a long time. The project deadline is very tight. Would you please give me some instructions on how to use Aduna Cluster Map. Could you please show me some example codes.

Looking forward to your reply.

Your help will be appreciated very much.

Felix This e-mail address is being protected from spambots. You need JavaScript enabled to view it '> This e-mail address is being protected from spambots. You need JavaScript enabled to view it

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written by Peep Küngas, November 06, 2009

Hello,

Below is the code snippet, which you might be interested in modifying and using for your own purposes. It generates an XML file, which can be read by Aduna Cluster Map. The code first fills the element with all object identifiers, which you would use in clusters and then in the element defines all clusters you need as whereas values of objectIDs parameter in element of each cluster refer to object identifiers, which were defined in .

public void exportDomainToClusterMap(ServiceGrounding[] sgs,
String exportFileName) throws Exception {
String[] literals = getSymbols(sgs);
Hashtable clusters = getDataClusters(sgs);
Hashtable ht = new Hashtable(
(literals.length + sgs.length) * 2);
String content = "n"
+ "n";
content += "n";
String rootObjects = "";
for (int i = 0; i < literals.length; i++) {
ht.put(literals, "m" + (i + 1));
rootObjects += "m" + (i + 1) + " ";
content += ""
+ literals
+ "http://onto.soatrader.com/X-RoadOntology.owl#"
+ literals + "n";
}

content += "nn";
content += "nX-Roadnnn";

Enumeration en = clusters.keys();
String clusterElements;
Integer clusterId;
HashSet clusterSet;
Iterator iter;
String url, provider;
while (en.hasMoreElements()) {
clusterId = (Integer) en.nextElement();
clusterSet = clusters.get(clusterId);
clusterElements = "";
iter = clusterSet.iterator();
while (iter.hasNext()) {
clusterElements += ht.get(iter.next()) + " ";
}
provider = getWSDLProviderName(clusterId);
if (provider == null) provider = "";
url = getWSDLUrl(clusterId);
content += "n"
+ provider + " " + url + "nnnn";
}
content += "nn";
saveFile(content, exportFileName);
}

Just let me know whether this was helpful for you:) Good luck with your project!

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