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Vocabularies and RDF Schema

While RDF defines syntax for metadata descriptions, it doesn’t include built-in metadata properties such as author, title, or date of creation. However, the RDF Schema Recommendation allows independent parties to define their own descriptive vocabularies that can be exchanged with others.

RDF Schema is an extension of RDF that supports the definition of RDF vocabularies through mechanisms for describing groups of related resources and their relationships. Following the layered architecture approach to web specifications, RDF Schema descriptions are written in RDF. The aim of RDF Schema is to allow developers to provide descriptions and property constraints on the resources in their domains.

Using RDF Schema, resources in a domain can be organized into classes that contain resource instances. Unlike class definitions in object-oriented systems, however, two classes may have the same set of instances yet still be different classes with different class properties.

For example, ZwiftBooks might define a class that defines "all the books of a specific publisher," while at the same time including those same books in the class of "books on shelves at the ZwiftBooks warehouse." Knowing that a book is a member of the publishing house class allows us to obtain information about the book publisher, such as address, contact person, and ordering instructions. Finding the same book in the ZwiftWarehouse class gives us additional information about the book, such as whether the book is available for instant delivery.

Like object systems, RDF Schema classes also support Subclassing, so that if some class C is a subclass of another class C1, then all instances of C will also be instances of C1 and inherit the properties of the superclass. In RDF Schema, we can specify subclasses by using the rdfs:subClassOf property.

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Pearson Education, Inc., 221 River Street, Hoboken, New Jersey 07030, (Pearson) presents this site to provide information about products and services that can be purchased through this site.

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Collection and Use of Information


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Other Collection and Use of Information


Application and System Logs

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Web Analytics

Pearson may use third party web trend analytical services, including Google Analytics, to collect visitor information, such as IP addresses, browser types, referring pages, pages visited and time spent on a particular site. While these analytical services collect and report information on an anonymous basis, they may use cookies to gather web trend information. The information gathered may enable Pearson (but not the third party web trend services) to link information with application and system log data. Pearson uses this information for system administration and to identify problems, improve service, detect unauthorized access and fraudulent activity, prevent and respond to security incidents, appropriately scale computing resources and otherwise support and deliver this site and its services.

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Security


Pearson uses appropriate physical, administrative and technical security measures to protect personal information from unauthorized access, use and disclosure.

Children


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Marketing


Pearson may send or direct marketing communications to users, provided that

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Correcting/Updating Personal Information


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Supplemental Privacy Statement for California Residents


California residents should read our Supplemental privacy statement for California residents in conjunction with this Privacy Notice. The Supplemental privacy statement for California residents explains Pearson's commitment to comply with California law and applies to personal information of California residents collected in connection with this site and the Services.

Sharing and Disclosure


Pearson may disclose personal information, as follows:

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Links


This web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every web site that collects Personal Information. This privacy statement applies solely to information collected by this web site.

Requests and Contact


Please contact us about this Privacy Notice or if you have any requests or questions relating to the privacy of your personal information.

Changes to this Privacy Notice


We may revise this Privacy Notice through an updated posting. We will identify the effective date of the revision in the posting. Often, updates are made to provide greater clarity or to comply with changes in regulatory requirements. If the updates involve material changes to the collection, protection, use or disclosure of Personal Information, Pearson will provide notice of the change through a conspicuous notice on this site or other appropriate way. Continued use of the site after the effective date of a posted revision evidences acceptance. Please contact us if you have questions or concerns about the Privacy Notice or any objection to any revisions.

Last Update: November 17, 2020