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1.1 Glossary

The following terms are defined in [MS-GLOS]:

fully qualified domain name (FQDN) (1)
globally unique identifier (GUID)
SOAP fault
SOAP message

The following terms are specific to this document:

anchor: An opaque data element generated by an update server to identify the occurrence of a software update-related event in a manner that distinguishes temporally separate occurrences of the event.

autonomous DSS: A downstream server (DSS) that obtains updates from its upstream server (USS) but manages the deployments of the updates to its client computers independently from its USS.

category: A logical grouping of updates identified by a GUID and described by metadata. A category can be treated as an update with no associated content.

client computer: A computer that gets its updates from an update server. A client computer can be a desktop, a server, or the update server itself.

content: A package consisting of all files associated with an update for installation on a client computer.

deployment: An administratively specified decision to make a specific update revision available to a specific target group.

detectoid: A logical condition that is evaluated on a client computer to detect the presence of software, drivers, or their updates. A detectoid is identified by a GUID and described by metadata. It is represented as an update with no associated content.

downstream server (DSS): An update server that synchronizes its updates from another update server.

DSS Authorization Web Service: A Web service on the USS used to authorize the release of updates to DSSs.

End User License Agreement (EULA): A textual description of the terms that a user or administrator must accept before an update is installed. Each EULA is identified by a GUID, and each update revision may be associated with a EULA.

metadata: XML-formatted data that defines the characteristics of an update, including its title, description, rules for determining whether the update is applicable to a client computer, and instructions for installing the updatecontent.

Microsoft Update: A Microsoft-hosted website located at http://update.microsoft.com.

patch storage format (PSF): A version of a content file that includes only changes in binary content from a previous version of a software/driver binary.

replica DSS: A DSS that obtains both updates and update deployments from its USS.

revision: A specific version of an update identified by a combination of an Update ID and a 32-bit revision number.

Server Sync Web Service: A Web service on the USS that provides updates of metadata and deployments information to the DSSs.

target group: A named collection of client computers whose members are defined administratively.

update: The combination of metadata and its associated content. An update is identified by a GUID.

update classification: A scheme to classify updates such as Critical, Security, Service Pack, and so on. An update classification is identified by a GUID and described by metadata. It can be treated as an update with no associated content.

update server: A machine that implements the Windows Update Services: Server-Server Protocol for providing updates to client computers and other update servers.

upstream server (USS): An update server that provides updates to other update servers.

web method: A discrete operation exposed by a Web service, called using a single SOAP message.

Web service: A software entity that responds to SOAP messages, as specified in [SOAP1.1] and [WSDL].

Web Services Description Language (WSDL): An XML-based standard for specifying message-based distributed services, as specified in [WSDL].

Windows Server Update Services (WSUS): An optional component of Windows 2000 Server and later releases that may be installed to enable a machine to operate as an update server.

MAY, SHOULD, MUST, SHOULD NOT, MUST NOT: These terms (in all caps) are used as described in [RFC2119]. All statements of optional behavior use either MAY, SHOULD, or SHOULD NOT.

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