| <!-- $Id$ --> |
| <html xmlns:v="urn:schemas-microsoft-com:vml" |
| xmlns:o="urn:schemas-microsoft-com:office:office" |
| xmlns:w="urn:schemas-microsoft-com:office:word" |
| xmlns="http://www.w3.org/TR/REC-html40"> |
| <link rel='stylesheet' type='text/css' href='css/site.css'> |
| <link rel='stylesheet' type='text/css' href='css/diagram.css'> |
| <style type='text/css'> |
| .note { font-size: smaller } |
| </style> |
| |
| <head> |
| <meta http-equiv=Content-Type content="text/html; charset=windows-1252"> |
| <meta name=ProgId content=Word.Document> |
| <meta name=Generator content="Microsoft Word 9"> |
| <meta name=Originator content="Microsoft Word 9"> |
| <link rel=File-List href="./validation_files/filelist.xml"> |
| <link rel=Edit-Time-Data href="./validation_files/editdata.mso"> |
| <link rel=OLE-Object-Data href="./validation_files/oledata.mso"> |
| <!--[if !mso]> |
| <style> |
| v\:* {behavior:url(#default#VML);} |
| o\:* {behavior:url(#default#VML);} |
| w\:* {behavior:url(#default#VML);} |
| .shape {behavior:url(#default#VML);} |
| </style> |
| <![endif]--> |
| <title>Validation</title> |
| <!--[if gte mso 9]><xml> |
| <o:DocumentProperties> |
| <o:Author>Jeffrey Rodriguez</o:Author> |
| <o:Template>Normal</o:Template> |
| <o:LastAuthor>Jeffrey Rodriguez</o:LastAuthor> |
| <o:Revision>5</o:Revision> |
| <o:TotalTime>421</o:TotalTime> |
| <o:LastPrinted>2000-10-06T22:51:00Z</o:LastPrinted> |
| <o:Created>2000-10-07T00:13:00Z</o:Created> |
| <o:LastSaved>2000-10-07T02:27:00Z</o:LastSaved> |
| <o:Pages>2</o:Pages> |
| <o:Words>553</o:Words> |
| <o:Characters>3155</o:Characters> |
| <o:Company>IBM</o:Company> |
| <o:Lines>26</o:Lines> |
| <o:Paragraphs>6</o:Paragraphs> |
| <o:CharactersWithSpaces>3874</o:CharactersWithSpaces> |
| <o:Version>9.3821</o:Version> |
| </o:DocumentProperties> |
| </xml><![endif]--> |
| <style> |
| <!-- |
| /* Style Definitions */ |
| p.MsoNormal, li.MsoNormal, div.MsoNormal |
| {mso-style-parent:""; |
| margin:0in; |
| margin-bottom:.0001pt; |
| mso-pagination:widow-orphan; |
| font-size:12.0pt; |
| font-family:"Times New Roman"; |
| mso-fareast-font-family:"Times New Roman";} |
| h1 |
| {mso-style-next:Normal; |
| margin:0in; |
| margin-bottom:.0001pt; |
| line-height:200%; |
| mso-pagination:widow-orphan; |
| page-break-after:avoid; |
| mso-outline-level:1; |
| font-size:12.0pt; |
| font-family:"Times New Roman"; |
| mso-font-kerning:0pt; |
| text-decoration:underline; |
| text-underline:single;} |
| h2 |
| {mso-style-next:Normal; |
| margin-top:0in; |
| margin-right:0in; |
| margin-bottom:0in; |
| margin-left:.25in; |
| margin-bottom:.0001pt; |
| mso-pagination:widow-orphan; |
| page-break-after:avoid; |
| mso-outline-level:2; |
| font-size:12.0pt; |
| font-family:"Times New Roman"; |
| font-weight:normal; |
| text-decoration:underline; |
| text-underline:single;} |
| p.MsoCaption, li.MsoCaption, div.MsoCaption |
| {mso-style-next:Normal; |
| margin-top:6.0pt; |
| margin-right:0in; |
| margin-bottom:6.0pt; |
| margin-left:0in; |
| mso-pagination:widow-orphan; |
| font-size:10.0pt; |
| font-family:"Times New Roman"; |
| mso-fareast-font-family:"Times New Roman"; |
| font-weight:bold;} |
| a:link, span.MsoHyperlink |
| {color:blue; |
| text-decoration:underline; |
| text-underline:single;} |
| a:visited, span.MsoHyperlinkFollowed |
| {color:purple; |
| text-decoration:underline; |
| text-underline:single;} |
| @page Section1 |
| {size:8.5in 11.0in; |
| margin:1.0in 1.25in 1.0in 1.25in; |
| mso-header-margin:.5in; |
| mso-footer-margin:.5in; |
| mso-paper-source:0;} |
| div.Section1 |
| {page:Section1;} |
| /* List Definitions */ |
| @list l0 |
| {mso-list-id:919675701; |
| mso-list-type:hybrid; |
| mso-list-template-ids:-133154018 67698703 67698691 67698693 67698689 67698691 67698693 67698689 67698691 67698693;} |
| ol |
| {margin-bottom:0in;} |
| ul |
| {margin-bottom:0in;} |
| --> |
| </style> |
| <!--[if gte mso 9]><xml> |
| <o:shapedefaults v:ext="edit" spidmax="1027"/> |
| </xml><![endif]--><!--[if gte mso 9]><xml> |
| <o:shapelayout v:ext="edit"> |
| <o:idmap v:ext="edit" data="1"/> |
| </o:shapelayout></xml><![endif]--> |
| </head> |
| |
| <body lang=EN-US link=blue vlink=purple style='tab-interval:.5in'> |
| |
| <div class=Section1> |
| |
| <h1 style='line-height:normal'><span style='font-size:18.0pt;mso-bidi-font-size: |
| 12.0pt'>Validation<o:p></o:p></span></h1> |
| |
| <p class=MsoNormal><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <p class=MsoNormal>The <i>Validator </i>is a component in this architecture |
| since it implements the <i>Component</i> interface and any class that |
| implements the Component Manager interface can manage it. E.g. a parser would |
| configure the <i>components</i> that it needs through this interface by |
| adhering to the guideline spelled out in the <a |
| href="architecture.html#Configuration.SettingsManagement">Setting Management</a> |
| section of this architecture overview.</p> |
| |
| <p class=MsoNormal>The <i>Component Manager</i> is in charge of setting up the |
| following internal <i>Validator</i> fields: <i>SymbolTable, GrammarPool and |
| ErrorFormatter.</i></p> |
| |
| <p class=MsoNormal>The Validator is universal since it is both a filter and a |
| source of document events regardless of the other components connected to in |
| the pipeline architecture. See figure 1. </p> |
| |
| <p class=MsoNormal align=center style='text-align:center'><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <p class=MsoCaption align=center style='text-align:center'><img border=0 |
| width=381 height=150 id="_x0000_i1025" src="images\pipeline.gif"></p> |
| |
| <p class=MsoCaption align=center style='text-align:center'>Figure <span |
| style='mso-field-code:"SEQ Figure \\* ARABIC"'>1</span>- Pipeline Architecture |
| - Sources & Filters</p> |
| |
| <p class=MsoNormal><span style="mso-spacerun: yes"> </span></p> |
| |
| <p class=MsoNormal>The following is an outline of the validation process used by |
| the Validator:</p> |
| |
| <p class=MsoNormal><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <ol style='margin-top:0in' start=1 type=1> |
| <li class=MsoNormal style='mso-list:l0 level1 lfo3;tab-stops:list .5in'>The |
| Validator uses the <i>Grammar pool</i> set by the Component Manager to |
| acquire Grammars. See <a href="#_Grammar_pool_and">Grammar pool and |
| Grammars</a> for more details</li> |
| <li class=MsoNormal style='mso-list:l0 level1 lfo3;tab-stops:list .5in'>The |
| Validator uses Grammars getter methods to gain access to Element, |
| Attribute, Notation, and Entity declarations.</li> |
| <li class=MsoNormal style='mso-list:l0 level1 lfo3;tab-stops:list .5in'>When a |
| document event (through the Document Handler of the Validator) is received |
| the respective declaration is obtained from the Grammar. </li> |
| <li class=MsoNormal style='mso-list:l0 level1 lfo3;tab-stops:list .5in'>These |
| declarations are used to validate content and content model. See <a |
| href="#_Data_type_and">Data type and Content model validators</a>.</li> |
| <li class=MsoNormal style='mso-list:l0 level1 lfo3;tab-stops:list .5in'>If no |
| validation errors are caught or returned. Then we generate a document |
| event using the registered Document handler of the next component in the |
| pipeline.</li> |
| <li class=MsoNormal style='mso-list:l0 level1 lfo3;tab-stops:list .5in'>If a |
| validation error is caught or returned then the error information is |
| formatted using the Error Formatter which in turn may call the Error |
| Handler.</li> |
| <li class=MsoNormal style='mso-list:l0 level1 lfo3;tab-stops:list .5in'>The |
| Validator component reset method allows setting a new component manager.</li> |
| </ol> |
| |
| <h2><![if !supportEmptyParas]> <![endif]><o:p></o:p></h2> |
| |
| <h1 style='line-height:normal'><a name="_Data_type_and"></a><span |
| style='font-size:18.0pt;mso-bidi-font-size:12.0pt'>Data type and Content model |
| validators</span><span style='font-size:18.0pt;mso-bidi-font-size:12.0pt; |
| font-weight:normal'><o:p></o:p></span></h1> |
| |
| <h2><![if !supportEmptyParas]> <![endif]><o:p></o:p></h2> |
| |
| <h2>Datatype validators</h2> |
| |
| <p class=MsoNormal><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <p class=MsoNormal>Datatype Validators are based on the XML Schema Datatype |
| draft. They are used by the Validator to validate attribute content in the case |
| of a DTD or XML Schema grammars and to validate element content in the case of |
| XML Schema grammars. Datatype validators implement the DatatypeValidator |
| interface.<span style="mso-spacerun: yes"> </span></p> |
| |
| <p class=MsoNormal>The Validator uses a factory method than implements the |
| DatatypeValidatorFactory to get datatypes instances.</p> |
| |
| <p class=MsoNormal>Datatype validators references are attached to the Element |
| and Attribute declaration in the internal implementation of Grammars. See <a |
| href="#_Grammar_pool_and">Grammar pools and Grammars</a> </p> |
| |
| <p class=MsoNormal><u><![if !supportEmptyParas]> <![endif]><o:p></o:p></u></p> |
| |
| <h2>Content model validators</h2> |
| |
| <p class=MsoNormal><u><![if !supportEmptyParas]> <![endif]><o:p></o:p></u></p> |
| |
| <p class=MsoNormal>Content model validators are used to check elements against |
| the content model defined in an Element Declaration for those elements. Content |
| model validators implement the ContentModelValidator interface.</p> |
| |
| <h1 style='line-height:normal'><a name="_Grammar_pool_and"></a><![if !supportEmptyParas]> <![endif]><o:p></o:p></h1> |
| |
| <h1 style='line-height:normal'><span style='font-size:18.0pt;mso-bidi-font-size: |
| 12.0pt'>Grammar pool and Grammars<o:p></o:p></span></h1> |
| |
| <p class=MsoNormal><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <p class=MsoNormal>A GrammarPool is a registry of Grammars. Grammars are keyed |
| using a grammar name which could be a name space. Grammars are classes |
| derived from the Grammar class. Grammars contain internal array structures, and |
| public getter methods that can be used by the Validator to access grammar |
| information. These getter methods provide access to different Declaration |
| constructs. </p> |
| |
| <p class=MsoNormal>These Declaration constructs are: XMLElementDecl, |
| XMLAttributeDecl, and XMLEntityDecl, and XMLNotationDecl. </p> |
| |
| <p class=MsoNormal>Other constructs available through the Grammars are: |
| XMLSimpleType, ContentModelValidator, and DatatypeValidator.</p> |
| |
| <p class=MsoNormal>XMLSimpleType (Simple type) declarations are a special type |
| of Element Declaration, which contains additional information beyond the one |
| provided by XMLElementDecl such as data type validator references.<span |
| style="mso-spacerun: yes"> </span></p> |
| |
| <p class=MsoNormal><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <h1 style='line-height:normal'><![if !supportEmptyParas]> <![endif]><o:p></o:p></h1> |
| |
| <h1><span style='font-size:18.0pt;mso-bidi-font-size:12.0pt'>Internal Grammar |
| Structures<o:p></o:p></span></h1> |
| |
| <p class=MsoNormal align=center style='text-align:center'> |
| <img border=0 width=578 height=587 |
| src="images\table.gif" > |
| </p> |
| |
| <p class=MsoNormal><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <p class=MsoNormal><b><span style='color:silver'><a href="architecture.html">Bach |
| to Architecture Overview</a></span></b></p> |
| |
| <p class=MsoNormal style='margin-left:.25in'><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| <p class=MsoNormal><![if !supportEmptyParas]> <![endif]><o:p></o:p></p> |
| |
| </div> |
| |
| </body> |
| |
| </html> |
