defguide/en/glossary.xml

   1 <glossary id="glossary">
   2 <?dbhtml filename="dbgloss.html"??>
   3 <glossaryinfo>
   4 <pubdate>$Date: 2001-08-02 18:27:50 +0800 (Thu, 02 Aug 2001) $</pubdate>
   5 <releaseinfo>$Revision: 546 $</releaseinfo>
   6 </glossaryinfo>
   7 <title>Glossary</title>
   8 <glossentry id="gloss-attribute"><glossterm>attribute</glossterm>
   9 <glossdef>
  10 <para>
  11 <indexterm><primary>attributes</primary></indexterm>
  12 <indexterm><primary>elements</primary>
  13   <secondary>attributes</secondary></indexterm>
  14
  15 Attributes augment the element on which they appear; they also
  16 provide additional information about the element.
  17 </para>
  18 <para>
  19 <indexterm><primary>start tags</primary>
  20   <secondary>attribute ID, containing</secondary></indexterm>
  21
  22 Attributes appear as name-value pairs in the element's start-tag.
  23 For example, to assign the value <literal>hostname</literal> to the
  24 <sgmltag class="attribute">Role</sgmltag> attribute of <sgmltag>SystemItem</sgmltag>,
  25 you would use the mark up:
  26 <sgmltag class="starttag">systemitem role="hostname"</sgmltag>.
  27 </para>
  28 </glossdef>
  29 </glossentry>
  30 <glossentry id="gloss-callout"><glossterm>callout</glossterm>
  31 <glossdef>
  32 <para>
  33 <indexterm><primary>callouts</primary></indexterm>
  34 A pointer, verbal or graphical or both, to a
  35 <emphasis>component</emphasis> of an illustration
  36 or a text object.</para>
  37 </glossdef>
  38 </glossentry>
  39 <glossentry id="gloss-cooked"><glossterm>cooked</glossterm>
  40 <glossdef>
  41 <para>
  42 <indexterm><primary>cooked data</primary></indexterm>
  43 <indexterm><primary>appearance</primary>
  44   <secondary>cooked data</secondary></indexterm>
  45
  46 <quote>Cooked</quote> data, as distinct from <quote>raw,</quote> is a collection
  47 of elements and character data that's ready for presentation. The processor
  48 is not expected to rearrange, select, or suppress any of the elements, but
  49 simply present them as specified.
  50 </para>
  51 <glossseealso>Raw</glossseealso>
  52 </glossdef>
  53 </glossentry>
  54 <glossentry id="gloss-dtd"><glossterm>document type declaration (&DTD;)</glossterm>
  55 <glossdef>
  56 <para>
  57 <indexterm><primary>document type declaration</primary></indexterm>
  58 <indexterm><primary>declarations</primary>
  59   <secondary>document type declaration</secondary></indexterm>
  60
  61 A set of declarations that defines the names of the elements
  62 and their attributes, and that specifies rules for their combination
  63 or sequence.
  64 </para>
  65 </glossdef>
  66 </glossentry>
  67 <glossentry id="gloss-dsssl"><glossterm><acronym>DSSSL</acronym></glossterm>
  68 <glossdef>
  69 <para>
  70 <indexterm><primary>DSSSL</primary></indexterm>
  71 <indexterm><primary>stylesheets</primary>
  72   <secondary>languages</secondary>
  73     <tertiary>DSSSL</tertiary></indexterm>
  74
  75 Document Style Semantics and Specification Language
  76 (<acronym>ISO</acronym>/<acronym>IEC</acronym> 10179:1996). An international standard stylesheet language
  77 for &SGML;/&XML; documents.
  78 </para>
  79 </glossdef>
  80 </glossentry>
  81 <glossentry id="gloss-element"><glossterm>element</glossterm>
  82 <glossdef>
  83 <para>
  84 <indexterm><primary>elements</primary></indexterm>
  85 <indexterm><primary>hierarchical structure</primary>
  86   <secondary>elements, defining</secondary></indexterm>
  87 <indexterm><primary>empty elements</primary></indexterm>
  88 <indexterm><primary>start tags</primary>
  89   <secondary>empty element</secondary></indexterm>
  90
  91 Elements define the hierarchical structure of a document.
  92 Most elements have start and end tags and contain some part of the
  93 document content. Empty elements have only a start tag and have no content.
  94 </para>
  95 </glossdef>
  96 </glossentry>
  97 <glossentry id="gloss-entity"><glossterm>entity</glossterm>
  98 <glossdef>
  99 <para>
 100 <indexterm><primary>entities</primary></indexterm>
 101 <indexterm><primary>data entities</primary></indexterm>
 102
 103 A name assigned (by means of a declaration) to some chunk of
 104 data so it can be referred to by that name; the data can be
 105 of various kinds (a special character or a chapter or a set of
 106 declarations in a &DTD;, for instance), and the way in which it is referred
 107 to depends on the type of data and where it is being referenced:
 108 &SGML; has parameter, general, external, internal, and data entities.</para>
 109 </glossdef>
 110 </glossentry>
 111 <glossentry id="gloss-excl"><glossterm>exclusion</glossterm>
 112 <glossdef>
 113 <para>
 114 <indexterm><primary>exclusions</primary></indexterm>
 115 <indexterm><primary>DTDs</primary>
 116   <secondary>exclusions</secondary></indexterm>
 117 <indexterm><primary>elements</primary>
 118   <secondary>exclusions</secondary></indexterm>
 119
 120 An exclusion is used in a &DTD; to indicate that, within the element on
 121 which the exclusion occurs, the excluded elements are not valid anywhere
 122 within the content of the element.
 123 </para>
 124 <para>
 125 <indexterm><primary>Footnote element</primary>
 126   <secondary>exclusions</secondary></indexterm>
 127 <indexterm><primary>nesting</primary>
 128   <secondary>footnotes</secondary></indexterm>
 129
 130 For example, in DocBook, <sgmltag>Footnote</sgmltag> excludes <sgmltag>Footnote</sgmltag>.
 131 This means that footnotes cannot nest, even though <sgmltag>Footnote</sgmltag>
 132 contains <sgmltag>Para</sgmltag>, and <sgmltag>Footnote</sgmltag> occurs in the proper
 133 content model of <sgmltag>Para</sgmltag>.
 134 </para>
 135 <para>
 136 See <xref linkend="s-ms"/>.</para>
 137 </glossdef>
 138 </glossentry>
 139 <glossentry id="gloss-extentity"><glossterm>external entity</glossterm>
 140 <glossdef>
 141 <para>
 142 <indexterm><primary>external general entities</primary></indexterm>
 143 <indexterm><primary>general entities</primary>
 144   <secondary>external</secondary></indexterm>
 145 <indexterm><primary>references</primary>
 146   <secondary>external documents</secondary></indexterm>
 147 <indexterm><primary>documents</primary>
 148   <secondary>external, references to</secondary></indexterm>
 149
 150 An external entity is a general entity that refers to another
 151 document. External entities are often used to incorporate
 152 parsable text documents, like legal notices or chapters, into larger
 153 units, like chapters or books.</para>
 154 </glossdef>
 155 </glossentry>
 156 <glossentry id="gloss-extsub"><glossterm>external subset</glossterm>
 157 <glossdef>
 158 <para>
 159 <indexterm><primary>external subset</primary></indexterm>
 160 <indexterm><primary>document type declaration</primary>
 161   <secondary>external subset</secondary></indexterm>
 162 <indexterm><primary>public identifiers</primary>
 163   <secondary>external subset</secondary></indexterm>
 164 <indexterm><primary>system identifiers</primary>
 165   <secondary>external subset</secondary></indexterm>
 166 <indexterm><primary>declarations</primary>
 167   <secondary>document type declaration</secondary></indexterm>
 168
 169
 170 Element, attribute, and other declarations that compose
 171 (part of) a document type definition that are stored in an
 172 external entity, and referenced from a document's document type
 173 declaration using a public or system identifier.</para>
 174 </glossdef>
 175 </glossentry>
 176 <glossentry id="gloss-float"><glossterm>float</glossterm>
 177 <glossdef>
 178 <para>
 179 <indexterm><primary>float</primary></indexterm>
 180 <indexterm><primary>text</primary>
 181   <secondary>float</secondary></indexterm>
 182
 183 Text objects like sidebars, figures, tables, and graphics are said
 184 to float when their actual place in the document is not fixed. For presentation
 185 on a printed page, for instance, a graphic may float to the top of the next page if it
 186 is too tall to fit on the page in which it actually falls, in the sequence of words and the sequence of
 187 other like objects in a document.</para>
 188 </glossdef>
 189 </glossentry>
 190 <glossentry id="gloss-fpi"><glossterm>formal public identifier</glossterm>
 191 <glossdef>
 192 <para>
 193 <indexterm><primary>FPI</primary></indexterm>
 194 <indexterm><primary>public identifiers</primary>
 195   <secondary>formal</secondary></indexterm>
 196 A public identifier that conforms to the specification of formal
 197 public identifers in <acronym>ISO</acronym> 8879.</para>
 198 </glossdef>
 199 </glossentry>
 200 <glossentry id="gloss-fosi"><glossterm><acronym>FOSI</acronym></glossterm>
 201 <glossdef>
 202 <para>
 203
 204 <indexterm><primary>FOSI stylesheets</primary></indexterm>
 205
 206 Formatting Output Specification Instance, an &SGML; document that
 207 specifies the appearance or presentation of another &SGML; document in
 208 accordance
 209 with the Output Specification &DTD; defined by <acronym>MIL-STD-28001C</acronym>.</para>
 210 </glossdef>
 211 </glossentry>
 212 <glossentry id="gloss-gentity"><glossterm>general entity</glossterm>
 213 <glossdef>
 214 <para>
 215 <indexterm><primary>general entities</primary></indexterm>
 216 <indexterm><primary>entities</primary>
 217   <secondary>general</secondary></indexterm>
 218 <indexterm><primary>special characters, encoding as entities</primary></indexterm>
 219 <indexterm><primary>internal general entities</primary></indexterm>
 220
 221 An entity referenced by a name that starts with an
 222 ampersand (&amp;) and ends with a semicolon. Most of the
 223 time general entities are used in &SGML; documents, not in the &DTD;.
 224 There are two types, external and internal entities, and they
 225 refer either to special characters or to text objects
 226 like commonly repeated phrases or names or chapters.</para>
 227 </glossdef>
 228 </glossentry>
 229 <glossentry id="gloss-gi"><glossterm><acronym>GI</acronym></glossterm>
 230 <glossdef>
 231 <para>
 232 <indexterm><primary>generic identifiers (GI)</primary></indexterm>
 233 <indexterm><primary>GI (generic identifiers)</primary></indexterm>
 234 <indexterm><primary>identifiers, generic</primary></indexterm>
 235 <indexterm><primary>elements</primary>
 236   <secondary>generic identifiers</secondary></indexterm>
 237 <indexterm><primary>names</primary>
 238   <secondary>elements (generic identifiers)</secondary></indexterm>
 239
 240 Generic identifier, proper term for the actual name of an element;
 241 <literal>Para</literal> is the generic identifier of the <sgmltag
 242 class="element">para</sgmltag> element.</para>
 243 </glossdef>
 244 </glossentry>
 245 <glossentry id="gloss-incl"><glossterm>inclusion</glossterm>
 246 <glossdef>
 247 <para>
 248 <indexterm><primary>inclusions</primary></indexterm>
 249 <indexterm><primary>DTDs</primary>
 250   <secondary>inclusions</secondary></indexterm>
 251 <indexterm><primary>elements</primary>
 252   <secondary>inclusions</secondary></indexterm>
 253 <indexterm><primary>nesting</primary>
 254   <secondary>elements</secondary></indexterm>
 255
 256 An inclusion is used in a &DTD; to indicate that, within the element on
 257 which the inclusion occurs, the included elements are valid anywhere
 258 within the content of the element.
 259 </para>
 260 <para>
 261 For example, in DocBook, <sgmltag>Chapter</sgmltag> includes <sgmltag>IndexTerm</sgmltag>.
 262 This means that <sgmltag>IndexTerm</sgmltag>s can occur anywhere inside chapters,
 263 even inside elements that do not have <sgmltag>IndexTerm</sgmltag>s in their
 264 proper content models.
 265 </para>
 266 <para>
 267 See <xref linkend="s-ms"/>.
 268 </para>
 269 </glossdef>
 270 </glossentry>
 271 <glossentry id="gloss-intentity"><glossterm>internal entity</glossterm>
 272 <glossdef>
 273 <para>
 274 <indexterm><primary>internal general entities</primary></indexterm>
 275 <indexterm><primary>general entities</primary>
 276   <secondary>internal</secondary></indexterm>
 277 <indexterm><primary>entities</primary>
 278   <secondary>general</secondary></indexterm>
 279
 280 A general entity that references a piece of text (including
 281 its markup and even other internal entities), usually as a
 282 keyboard shortcut.</para>
 283 </glossdef>
 284 </glossentry>
 285 <glossentry id="gloss-intsub"><glossterm>internal subset</glossterm>
 286 <glossdef>
 287 <para>
 288 <indexterm><primary>internal subset</primary></indexterm>
 289 <indexterm><primary>document type declaration</primary>
 290   <secondary>internal subset</secondary></indexterm>
 291 <indexterm><primary>declarations</primary>
 292   <secondary>document type declaration</secondary></indexterm>
 293
 294 Element, attribute, and other declarations that compose
 295 (part of) a document type definition that are stored in a document,
 296 within the document type declaration.
 297 </para>
 298 </glossdef>
 299 </glossentry>
 300 <glossentry id="gloss-metainfo"><glossterm>meta-information</glossterm>
 301 <glossdef>
 302 <para>
 303 <indexterm><primary>meta-information</primary></indexterm>
 304 <indexterm><primary>documents</primary>
 305   <secondary>meta-information</secondary></indexterm>
 306
 307 Meta-information is information about a document, such as the
 308 specification of its author or its date of composition, as opposed
 309 to the content of a document itself.</para>
 310 </glossdef>
 311 </glossentry>
 312 <glossentry id="gloss-pentity"><glossterm>parameter entity</glossterm>
 313 <glossdef>
 314 <para>
 315 <indexterm><primary>parameter entities</primary></indexterm>
 316 <indexterm><primary>DocBook DTD</primary>
 317   <secondary>customizing</secondary>
 318     <tertiary>parameter entities</tertiary></indexterm>
 319 <indexterm><primary>customization (DocBook DTD)</primary>
 320   <secondary>parameter entities, using</secondary></indexterm>
 321 <indexterm><primary>marked sections</primary>
 322   <secondary>parameter entities, controlling</secondary></indexterm>
 323
 324 An entity usually referenced in the &DTD; by a name that
 325 starts with a percent sign (%) and ends with a semicolon.
 326 In DocBook, parameter entities are mainly used to facilitate
 327 customization of the &DTD;, but they can also be used to control
 328 marked sections of a document.</para>
 329 </glossdef>
 330 </glossentry>
 331 <glossentry id="gloss-pi"><glossterm>processing instruction</glossterm>
 332 <glossdef>
 333 <para>
 334 <indexterm><primary>processing instructions</primary></indexterm>
 335
 336 An essentially arbitrary string preceded by a question mark and
 337 delimited by angle brackets that is intended to convey
 338 information to an application that processes an &SGML; instance.
 339 For example, the processing instruction <literal>&lt;?linebreak&gt;</literal>
 340 might cause the formatter to introduce a line break at the position where
 341 the processing instruction occurs.
 342 </para>
 343 <para>
 344 <indexterm><primary>XML</primary>
 345   <secondary>processing instructions</secondary></indexterm>
 346 <indexterm><primary>PI</primary><see>processing instructions</see></indexterm>
 347
 348 In &XML; documents, processing instructions should have the form:
 349 <screen>
 350 &lt;?<replaceable>pitarget</replaceable> param1="value1" param2="value2"?&gt;
 351 </screen>
 352 </para>
 353 <para>
 354 The <replaceable>pitarget</replaceable> should be a name that the processing application
 355 will recognize. Additional information in the <acronym>PI</acronym> should be added using
 356 <quote>attribute syntax.</quote>
 357 </para>
 358 </glossdef>
 359 </glossentry>
 360 <glossentry id="gloss-pubid"><glossterm>public identifier</glossterm>
 361 <glossdef>
 362 <para>
 363 <indexterm><primary>public identifiers</primary></indexterm>
 364 <indexterm><primary>external general entities</primary>
 365   <secondary>public identifiers</secondary></indexterm>
 366 <indexterm><primary>SGML</primary>
 367   <secondary>public identifiers</secondary></indexterm>
 368 <indexterm><primary>XML</primary>
 369   <secondary>public identifiers</secondary></indexterm>
 370 <indexterm><primary>DTDs</primary>
 371   <secondary>public identifiers</secondary></indexterm>
 372
 373 An abstract identifier for an &SGML; or &XML; document, &DTD;, or
 374 external entity.</para>
 375 </glossdef>
 376 </glossentry>
 377 <glossentry id="gloss-raw"><glossterm>raw</glossterm>
 378 <glossdef>
 379 <para>
 380 <indexterm><primary>raw data</primary></indexterm>
 381 <indexterm><primary>appearance</primary>
 382   <secondary>raw data</secondary></indexterm>
 383 <indexterm><primary>raw data</primary><seealso>cooked data</seealso></indexterm>
 384 <indexterm><primary>cooked data</primary><seealso>raw data</seealso></indexterm>
 385
 386 <quote>Raw</quote> data is just a collection of elements, with no additional
 387 punctation or information about presentation. To continue the cooking
 388 metaphor, raw data is just a set of ingredients. It's up to the processor
 389 to select appropriate elements, arrange them for display, and add
 390 required presentational information.
 391 </para>
 392 <glossseealso>Cooked</glossseealso>
 393 </glossdef>
 394 </glossentry>
 395 <glossentry id="gloss-sgml"><glossterm>&SGML;</glossterm>
 396 <glossdef>
 397 <para>
 398 <indexterm><primary>SGML</primary></indexterm>
 399 <indexterm><primary>ISO standards</primary>
 400   <secondary>SGML</secondary></indexterm>
 401
 402 Standard Generalized Markup Language, an international standard (<acronym>ISO</acronym> 8879) that specifies
 403 the rules for the creation of platform-independent markup languages for electronic texts.
 404 </para>
 405 </glossdef>
 406 </glossentry>
 407 <glossentry id="gloss-stylesheet"><glossterm>stylesheet</glossterm>
 408 <glossdef>
 409 <para>
 410 <indexterm><primary>stylesheets</primary></indexterm>
 411 <indexterm><primary>appearance</primary>
 412   <secondary>stylesheets</secondary></indexterm>
 413
 414 A file that specifies the presentation or appearance of a document;
 415 there are several standards for such stylesheets, including
 416 <acronym>CSS</acronym>, <acronym>FOSI</acronym>s, <acronym>DSSSL</acronym>, and, most recently, <acronym>XSL</acronym>. Vendors often have proprietary
 417 stylesheet formats as well.
 418 </para>
 419 </glossdef>
 420 </glossentry>
 421 <glossentry id="gloss-sysid"><glossterm>system identifier</glossterm>
 422 <glossdef>
 423 <para>
 424 <indexterm><primary>system identifiers</primary>
 425   <secondary>SGML</secondary></indexterm>
 426 <indexterm><primary>SGML</primary>
 427   <secondary>system identifiers</secondary></indexterm>
 428
 429 In &SGML;, a local, system-dependent identifier for a document,
 430 &DTD;, or external entity. Usually a filename on the local system.</para>
 431 <para>
 432 <indexterm><primary>system identifiers</primary>
 433   <secondary>XML</secondary></indexterm>
 434 <indexterm><primary>URI</primary>
 435   <secondary>XML system identifiers</secondary></indexterm>
 436 <indexterm><primary>XML</primary>
 437   <secondary>system identifiers</secondary></indexterm>
 438
 439 In &XML;, a system identifer is required to be a <acronym>URI</acronym>.
 440 </para>
 441 </glossdef>
 442 </glossentry>
 443 <glossentry id="gloss-tag"><glossterm>tag</glossterm>
 444 <glossdef>
 445 <para>
 446 <indexterm><primary>tags</primary></indexterm>
 447 <indexterm><primary>elements</primary>
 448   <secondary>tags</secondary></indexterm>
 449 <indexterm><primary>angle brackets</primary>
 450   <secondary>SGML tags</secondary></indexterm>
 451 <indexterm><primary>SGML</primary>
 452   <secondary>tags</secondary></indexterm>
 453
 454 An &SGML; element name enclosed in angle brackets
 455 (&lt;&gt;), used to mark up the semantics or structure of a
 456 document. <sgmltag class="starttag">Para</sgmltag> is a tag in DocBook
 457 used to mark the beginning of a paragraph.</para>
 458 </glossdef>
 459 </glossentry>
 460 <glossentry id="gloss-uri"><glossterm><acronym>URI</acronym></glossterm>
 461 <glossdef>
 462 <para>
 463 <indexterm><primary>URI</primary></indexterm>
 464 <indexterm><primary>Internet names and addresses</primary></indexterm>
 465 <indexterm><primary>addresses, Internet syntax</primary></indexterm>
 466 <indexterm><primary>names</primary>
 467   <secondary>Internet, syntax</secondary></indexterm>
 468
 469 Uniform Resource Identifier, the <acronym>W3C</acronym>'s codification of the name and
 470 address syntax of present and future objects on the Internet. In its most basic
 471 form, a <acronym>URI</acronym> consists of a scheme name (such as file, http, ftp, news, mailto,
 472 gopher) followed by a colon, followed by a path whose nature is determined
 473 by the scheme that precedes it (see <acronym>RFC</acronym> 1630).
 474 </para>
 475 <para>
 476 <indexterm><primary>URN</primary></indexterm>
 477 <indexterm><primary>URL</primary></indexterm>
 478
 479 <acronym>URI</acronym> is the umbrella term for <acronym>URN</acronym>s, <acronym>URL</acronym>s, and all other Uniform Resource
 480 Identifiers.
 481 </para>
 482 </glossdef>
 483 </glossentry>
 484 <glossentry id="gloss-url"><glossterm><acronym>URL</acronym></glossterm>
 485 <glossdef>
 486 <para>Uniform Resource Locator, a name and address for an existing object
 487 accessible over the Internet. <literal>http://www.docbook.org</literal>
 488 is an example of a <acronym>URL</acronym> (see <acronym>RFC</acronym> 1738).</para>
 489 </glossdef>
 490 </glossentry>
 491 <glossentry id="gloss-urn"><glossterm><acronym>URN</acronym></glossterm>
 492 <glossdef>
 493 <para>Uniform Resource Name, the result of an evolving attempt to
 494 define a name and address syntax for <emphasis>persistent</emphasis>
 495 objects accessible over the Internet; <literal>urn:foo:a123,456</literal>
 496 is a legal <acronym>URN</acronym> consisting of three colon-separated fields:
 497 <literal>urn</literal>
 498 followed by a namespace identifier, followed by a namespace specifier
 499 (see <acronym>RFC</acronym> 1737 and <acronym>RFC</acronym> 2141 for details).</para>
 500 </glossdef>
 501 </glossentry>
 502 <glossentry id="gloss-w3c"><glossterm><acronym>W3C</acronym></glossterm>
 503 <glossdef>
 504 <para>
 505 <indexterm><primary>W3C (World Wide Web Consortium)</primary></indexterm>
 506 <indexterm><primary>World Wide Web Consortium (W3C)</primary></indexterm>
 507
 508 The World Wide Web Consortium (<ulink url="http://www.w3.org/">http://www.w3.org/</ulink>).</para>
 509 </glossdef>
 510 </glossentry>
 511 <glossentry id="gloss-wrapper"><glossterm>wrapper</glossterm>
 512 <glossdef>
 513 <para>
 514 <indexterm><primary>wrappers</primary></indexterm>
 515 <indexterm><primary>meta-information</primary>
 516   <secondary>wrappers</secondary></indexterm>
 517 <indexterm><primary>elements</primary>
 518   <secondary>wrappers</secondary></indexterm>
 519
 520 Some elements, such as <sgmltag>Chapter</sgmltag>, have important semantic
 521 significance.  Other elements serve no obvious purpose except to contain
 522 a number of other elements. For example, <sgmltag>BookInfo</sgmltag> has no
 523 important semantics; it merely serves as a container for the meta-information
 524 about a book.  Elements that are just containers are sometimes called
 525 <quote>wrappers.</quote>
 526 </para>
 527 </glossdef>
 528 </glossentry>
 529 <glossentry id="gloss-xml"><glossterm>&XML;</glossterm>
 530 <glossdef>
 531 <para>
 532 <indexterm><primary>XML</primary></indexterm>
 533 <indexterm><primary>SGML</primary>
 534   <secondary>XML and</secondary></indexterm>
 535 <indexterm><primary>Extensible Markup Language</primary><see>XML</see></indexterm>
 536
 537 The <ulink url="http://www.w3.org/TR/REC-xml">Extensible Markup Language</ulink>, a subset of &SGML;
 538 designed specifically for use over the Web.</para>
 539 </glossdef>
 540 </glossentry>
 541 <glossentry id="gloss-xsl"><glossterm><acronym>XSL</acronym></glossterm>
 542 <glossdef>
 543 <para>
 544 <indexterm><primary>XSL</primary></indexterm>
 545 <indexterm><primary>XML</primary>
 546   <secondary>XSL stylesheets</secondary></indexterm>
 547 &XML; Style Language, an evolving language for stylesheets
 548 to be attached to &XML; documents. The stylesheet is itself an &XML;
 549 document.</para>
 550 </glossdef>
 551 </glossentry>
 552 </glossary>
 553
 554