Project Description
This .NET 3.5 class library provides a wrapper for the Calais web service.
Calais allows you to automatically annotate your content with rich semantic metadata, including companies, cities, industry terms and people.

This is a work in progress. If you have any problems or ideas for improvements please let us know :D

Calais v4 Support

Please check the 'CalaisDotNet-v4Support' branch for code supporting version 4 of the web service.
It's not all there yet but all the new entities and types have been added but there is no support for French at this time.
Please report any bugs or weirdness. Once all new features are supported we will do a new release.

Project Information

Read more about Calis at http://opencalais.com/

Language:	C# 3.0
Requirements:	.NET Framework 3.5
Developer's blogs:
Chris Fulstow	chrisfulstow.com/blog/
[mRg] (emargee)	ultramagnus.org/

Step 1
Get a Calais API key here

Step 2
Add Calais.NET to your project.

Step 3
Use the Calais.NET API to extract metadata from your content.

Example

// Get some contet to process
string content = (new WebClient()).DownloadString("http://news.bbc.co.uk/");

// Pass in the content as a string and also your calais API key
var calais = new CalaisDotNet(apiKey, content);

// Tell calaisdotnet what output format you want to work with (ie CalaisSimpleDocument / CalaisRdfDocument / CalaisJsonDocument etc)
var document = calais.Call<CalaisSimpleDocument>(); 

// Output the raw response from the web service
Console.WriteLine(document.RawOutput); 

// Organize Entities in various ways (ie Relevance)
var sorted = from item in document.Entities
                   orderby item.Relevance descending 
                   select item;

foreach (var entity in sorted)
{
    Console.WriteLine(entity.Value + " / " + entity.Type + " / " + entity.Frequency + " / " + entity.Relevance);    
}

RDF Example

var calais = new CalaisDotNet(apiKey, content);

// Tell calaisdotnet you want to work with RDF output 
var document = calais.Call<CalaisRdfDocument>(); 

// Output the raw response from the web service
Console.WriteLine(document.RawOutput); 

// Filter entities by type (ie Country)
var results = from item in document.Entities
                   where item.EntityType == CalaisRdfEntityType.Country
                   select item;

foreach (var result in results)
{
    Console.Write(result);
    Console.WriteLine(" (Freq: " + result.Instances.Count() +")");
}

// or you can filter based on entity relationship
var moreResults = from item in document.Relationships
                  where item.RelationshipType == CalaisRdfRelationshipType.PersonPolitical
                  select item;

foreach (var result in moreResults)
{
    Console.Write(result.RelationshipType + ": " + result);
    Console.WriteLine(" (Freq: " + result.Instances.Count() + ")");
}