346. What is component (JavaServer Faces technology)

A user interface control that outputs data to a clientor allows a user to input data to a JavaServer Faces application.

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345. What is binary entity

A general entity that contains something other than XML. By its nature, an unparsed entity contains binary data.

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344. What is XSLTC

A compiling version of XSLT.

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343. What is XSLT

XSL Transformations. An XML document that controls the transformation of an XML document into another XML document or HTML. The target document often has presentation-related tags dictating how it will be rendered by a browser or other presentation mechanism. XSLT was formerly a part of XSL, which also included a
tag language of style flow objects.

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342. What is XSL-FO

A subcomponent of XSL used for describing font sizes, page layouts, and how information flows from one page to another.

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341. What is XSL

Extensible Style sheet Language. A standard that lets you do the following: Specify an addressing mechanism, so that you can identify the parts of an XML document that a transformation applies to (XPath). Specify tag conversions, so that you can convert XML data into different formats (XSLT). Specify display characteristics, such page sizes, margins, and font heights and widths, as well as the flow objects on each page. Information fills in one area of a page and then automatically flows to the next object when that area fills up. That allows you to wrap text around pictures, for example, or to continue a newsletter article on a different page (XSL-FO).

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340. What is XPointer

The part of the XLL specification that is concerned with identifying sections of documents so that they can be referenced in links or included in other documents.

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339. What is XPath

An addressing mechanism for identifying the parts of an XML document.

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338. What is XML Schema

The W3C specification for defining the structure, content, and semantics of XML documents.

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337. What is XML registry

An infrastructure that enables the building, deployment, and discovery of Web services. It is a neutral third party that facilitates dynamic and loosely coupled business-to-business (B2B) interactions.

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336. What is XML

Extensible Markup Language. A markup language that allows you to define the tags (markup) needed to identify the content, data, and text in XML documents. It differs from HTML, the markup language most often used to present information on the Internet. HTML has fixed tags that deal mainly with style or presentation. An XML document must undergo a transformation into a language with style tags under the control of a style sheet before it can be presented by a browser or other presentation mechanism. Two types of style sheets used with XML are CSS and XSL. Typically, XML is transformed into HTML for presentation. Although tags can be defined as needed in the generation of an XML document, a document type definition (DTD) can be used to define the elements allowed in a particular type of document. A document can be compared by using the rules in the DTD to determine its validity and to locate particular elements in the document. A Web services application'sJ2EE deployment descriptors are expressed in XML with schemas defining allowed elements. Programs for processing XML documents use SAX or DOM APIs.

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335. What is XLL

The XML Link Language specification, consisting ofXLink and XPointer.

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334. What is XLink

The part of the XLL specification that is concerned with specifying links between documents.

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333. What is XHTML

An XML look-alike for HTML defined by one of several XHTML DTDs. To use XHTML for everything would of course defeat the purpose of XML, because the idea ofXML is to identify information content, and not just
to tell how to display it. You can reference it in aDTD, which allows you to say, for example, that the text in an element can contain < em > and < b > tags rather than being limited to plain text.

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332. What is Xalan

An interpreting version of XSLT.

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331. What is well-formed

An XML document that is syntactically correct. It does not have any angle brackets that are not part of tags, all tags have an ending tag or are themselves self-ending, and all tags are fully nested. Knowing that a document is well formed makes it possible to process it. However, a well-formed document may not be valid. To determine that, you need a validating parser and a DTD.

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330. What is Web service

An application that exists in a distributed environment, such as the Internet. A Web service accepts a request, performs its function based on the request, and returns a response. The request and the response can be part of the same operation, or they can occur separately, in which case the consumer does not need to wait for a response. Both the request and the response usually take the form of XML, a portable data-interchange format, and are delivered over a wire protocol, such as HTTP.

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329. What is Web server provider

A vendor that supplies a Web server.

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328. What is Web server

Software that provides services to access the Internet, an intranet, or an extranet. A Web server hosts Web sites, provides support for HTTP and other protocols, and executes server-side programs (such asCGI scripts or servlets) that perform certain functions. In the J2EE architecture, a Web server provides services to a Web container. For example, aWeb container typically relies on a Web server to provide HTTP message handling. The J2EE architecture assumes that a Web container is hosted by a Web server from the same vendor, so it does not specify the contract between these two entities. A Web server can host one or more Web containers.

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327. What is Web resource collection

A list of URL patterns and HTTP methods that describe a set of Web resources to be protected.

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326. What is Web resource

A static or dynamic object contained in a Web application that can be referenced by a URL.

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325. What is Web module

A deployable unit that consists of one or more Web components, other resources, and a Web application deployment descriptor contained in a hierarchy of directories and files in a standard Web application format.

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324. What is Web container provider

A vendor that supplies a Web container.

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323. What is Web container, distributed

A Web container that can run a Web application that is tagged as distributable and that executes across multiple Java virtual machines running on the same host or on different hosts.

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322. What is Web container

A container that implements the Web component contractof the J2EE architecture. This contract specifies a runtime environment for Web components that includessecurity, concurrency, life-cycle management,transaction, deployment, and other services. A Webcontainer provides the same services as a JSPcontainer as well as a federated view of the J2EEplatform APIs. A Web container is provided by a Web or J2EE server.

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321. What is Web component

A component that provides services in response to requests; either a servlet or a JSP page.

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320. What is Web application, distributable

A Web application that uses J2EE technology written so that it can be deployed in a Web container distributed across multiple Java virtual machines running on the same host or different hosts. The deployment descriptor for such an application uses the distributable element.

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319. What is Web application

An application written for the Internet, including those built with Java technologies such as Java Server Pages and servlets, as well as those built with non-Java technologies such as CGI and Perl.

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318. What is warning

A SAX parser warning is generated when the document's DTD contains duplicate definitions and in similar situations that are not necessarily an error but which the document author might like to know about, because
they could be. See also fatal error, error.

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317. What is WAR file

Web application archive file. A JAR archive that contains a Web module.

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316. What is W3C

World Wide Web Consortium. The international body that governs Internet standards.

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315. What is virtual host

Multiple hosts plus domain names mapped to a single IPaddress.

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314. What is value-binding _expression

A Java Server Faces EL _expression that refers to a property of a backing bean. A component tag uses this _expression to bind the associated component's value or the component instance to the bean property. If the component tag refers to the property via its value attribute, then the component's value is bound to the property. If the component tag refers to the property via its binding attribute then the component itself is bound to the property.

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313. What is validating parser

A parser that ensures that an XML document is valid in addition to being well formed. See also parser.

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312. What is user (security)

A valid XML document, in addition to being well formed, conforms to all the constraints imposed by a DTD. It does not contain any tags that are not permitted by the DTD, and the order of the tags conforms to the DTD's specifications.

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311. What is user (security)

An individual (or application program) identity that has been authenticated. A user can have a set of roles
associated with that identity, which entitles the user to access all resources protected by those roles.

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