12. A system including a computer processor and comprising the following computer-executable components: a receiver component that receives a uniform resource identifier that corresponds to a web page, the uniform resource identifier included in a message to be displayed by way of a communications application; a selector component that selects an extractor definition from a plurality of extractor definitions, wherein the extractor definition is configured to indicate one or more entities that are desirably extracted from the web page, wherein the extractor definition comprises a plurality of properties for extracting a particular entity, wherein the properties have priorities corresponding thereto, and wherein the extractor component extracts the particular entity based at least in part upon the priorities corresponding to the properties; an extractor component that extracts the one or more entities from the web page as indicated in the extractor definition; a packager component that packages the one or more entities extracted from the web page in a structured data object; and a display component that displays a summary of the web page based at least in part upon the structured data object, the display component displaying the summary of the web page in the message in place of the uniform resource identifier.
17. The system of claim 12 , wherein the communications application is one of an email application, an instant messaging application, or a social networking application.