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PublisherChapter 33. The System.Web.Services.Discovery Namespace
The System.Web.Services.Discovery
namespace includes the classes that model .NET web service discovery
documents (usually seen as .disco or
.vsdisco files). These classes are generally not
used directly, as the discovery process is automated in tools such as
Visual Studio .NET. However, they could be used to create programs
that worked with discovery documents for reasons other than consuming
a given web service. For example, you could create a utility that
parses multiple discovery documents and retrieves aggregate
information.The discovery process has little to do with Universal Description,
Design, Discovery, and Integration (UDDI), the cross-vendor
initiative for publishing information about business and their web
services in an online repository. (In fact, UDDI repositories can
provide links to web services or discovery documents.) Discovery
documents are a simple approachessentially nothing more than a
collection of links without any associated documentation or
categorization. These "links" can
point to WSDL service descriptions, XSD schemas, or other discovery
documents. It's also important to note that
discovery in Versions 1.0 and 1.1 of the .NET Framework does not use
the WS-Inspection standard, which is slated to eventually replace
DISCO.A good starting point to understanding this namespace is the
DiscoveryDocument class, which represents a single
.disco or .vsdisco file.
The most useful type in this namespace is the
DiscoveryClientProtocol class, which allows you to
invoke web service discovery programmatically. Figure 33-1 shows the types in this namespace.
Figure 33-1. The System.Web.Services.Discovery namespace
