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Tutorial Addendum On XML Technologies - XSL - Accepting Ethics Out Of Antecedent Elements

 Openning dictionary_xsl.xml with Internet Explorer, I got: d_dictionary w__worda___acronym=truee___namet____XMLe___definitiont____eXtensible Markup Language.e___updatea____date=2002-12-23w__worda___symbol=truee___namet____<e___definitiont____Mathematical attribute apery the "less than" analytic operation, like: 1<2.e___definitiont____Reserved attribute in XML apery the alpha of tags, like: t____<p>Hello world!</p>Note that: The arch appearance tells me area that section of achievement came from.The CDATA area in the endure "definition" aspect was parsed as a afar argument part.That s why I got two pieces of achievement out of this element.The if Elementif: An XSL element, confined as a codicillary statement. If the defined conditionis satisfied, the amid statements will be processed. Otherwise, they will be ignored. <xsl:if test="condition"> XSL statements</xsl:if>where "condition" is a analytic expression. The accept Elementchoose: An XSL element, confined as a codic... Read More by user

Tutorial Addendum On XML Technologies - XSL - Accepting Ethics Out Of Antecedent Elements

 Openning dictionary_xsl.xml with Internet Explorer, I got: dictionary word |-acronym=true |-symbol= name XML definition adaptable Markup Language. date |-acronym=2002-12-23 word |-acronym= |-symbol=true name < definition Algebraic attribute apery the "less than" analytic operation, like: 1<2. definition Aloof attribute in XML apery the alpha of tags, like: <p>Hello world!</p> Note that:The band break in argument capacity of antecedent aspect were maintained by the "value-of"statement.The entities, like &lt;, in argument agreeable of antecedent aspect were aswell maintained by the "value-of" statement. They were presented by IE with their values, like <.The animadversion in the antecedent book was ignored. But the hotlink breach that starts the commentline was maintained. This is why I got a bare band beneath "dictionary".The "value-of" statements on amorphous attributes alternate abandoned strings.The for-each ElementThe XSL account we accept abstruse so far are all ... Read More by user

Tutorial Addendum On XML Technologies - XSL - Accepting Ethics Out Of Antecedent Elements

 After abstruse how and if to transform an aspect and its adolescent elements in the XML sourcefile, now we are traveling to attending at how to retrieve ethics out of the altered locations of thesource element.The value-of Elementvalue-of: An XSL element, confined as an appraisal statement. It computes the cord amount of a defined allotment of an aspect in antecedent XML file. The aftereffect of "value-of" account is insertedinto the output. <xsl:value-of select="."/><xsl:value-of select="@attribute_name"/><xsl:value-of select="child_element_name"/>where "." specifies to compute the cord amount of the accepted element, "@attribute_name"specifies to compute the cord amount of a accustomed attribute, and "child_element_name" specifies to compute the cord amount of a accustomed adolescent element.The cord amount of an aspect is infact the aforementioned as the achievement of the absence template.It contains alone the argument locations of the agreeable of the aspect and its adole... Read More by user

Tutorial Addendum On XML Technologies - XSL - Declaring and Applying Templates

 Notice that the achievement architecture is abundant bigger now. Why? I accept amid a brace of HTML tags,<pre> and </pre> at the alpha and the end of the backup agreeable for the root aspect "p". It tells IE to present aggregate in amid as pre-formatted text, meaning account the white spaces. Then I affected and pasted the argument out of the IE windowinto my note. In adjustment to accept how the achievement got produced, let s act like the XSL processor doing the transformation our self: Transformation starts on the basis aspect "p" automatically. Template for aspect "p" is available, so we use it.In arrangement for aspect "p", argument "Replacement p1." is reached, so forward it to output.Then the arrangement calls for transforming aspect "c1", so we seek for template for "c1". Template for aspect "c1" is available, so we will go into it. In arrangement for aspect "c1", argument "Replacement c11." is reached, so forward it to output.Then the templates calls for transforming asp... Read More by user

Tutorial Addendum On XML Technologies - XSL - Declaring and Applying Templates

 Transformation ChainsWhen the XSL processor is transforming an aspect with a template, if the arrangement containsan "apply-templates" statement, the XSL processor will authority the transformation of the current element, and starts the transformation requested by the "apply-templates" statement.If the arrangement acclimated in the additional transformation aswell contains addition "apply-templates"statement, the XSL processor will authority the additional transformation, and starts a third transformation. This processing arrangement is basic a transformation chain, actual abundant likethe adjustment beheading alternation formed if active a Java program. Let s use the afterward XML file, tree.xml, to analyze how XSL processor is assuming transformations central additional transformations: <?xml version="1.0"?><?xml-stylesheet type="text/xsl" href="tree.xsl"?><p> Argument p1. <c1> Argument c11. <g11>Text g11.</g11> Argument c12. <g12>Text g12.</g12> Argument c13.... Read More by user

Tutorial Addendum On XML Technologies - XSL - Declaring and Applying Templates

 The apply-templates Elementapply-templates: An XSL aspect confined as an activity statement. It requests the XSL processor to administer transformation templates to assertive elements in the source XML file. <xsl:apply-templates select="pattern"/><xsl:apply-templates/>where "pattern" is a arrangement acclimated to bout aspect names in the antecedent XML file.An "apply-templates" account is alone acclimated central a "template" statement, and the "pattern" analogous action is done in advertence to the accepted aspect on which the "template" account has been applied. For example, if "pattern" is an elementname, it will be akin alone adjoin adolescent elements of the accepted element. The achievement of the requested transformation on the akin elements will be allotment of the backup agreeable of the accepted element.If "pattern" matches no element, annihilation will happen.If "pattern" matches assorted elements, all of the akin elements will be transformed.If aspect "select" is not... Read More by user
Tags: child, world, example, started, elements, templates, apply, statement, match, source, transform

Tutorial Addendum On XML Technologies - XSL - Declaring and Applying Templates

 Since XSL is a accent based on XML, so all XSL statements are accounting as XML elements. In this note, we will apprentice and play with three basal XSL elements:"stylesheet": Desclaring an XSL appearance sheet."template": Declaring an XSL transformation template."apply-templates": Requesting to administer transformation templates.With them, we can ascendancy the XSL processor: To transform a called aspect by replacing it with a accustomed argument string.To adjure a transformation of a adolescent aspect aural the transformation of the ancestor element. The stylesheet Elementstylesheet: The basis aspect of an XSL file, confined as the XSL acknowledgment statement. It specifies the XSL adaptation number,and assembly the XSL namespace to a name prefix. <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> XSL_elements</xsl:stylesheet>The arrangement Elementtemplate: An XSL element, confined as the arrangement acknowledgment statement.It defines the backup ... Read More by user

Tutorial Addendum On XML Technologies - XSL - Formatting Achievement

 2. Using "element" and "attribute" statements: element: An XSL element, confined as an achievement statement. It inserts an XML elementwith the defined name into the output. <element name="e_name"> XSL statements</element>where "e_name" is acclimated as the name of the aspect to be amid into the output. Outputproduced by the amid XSL statements will be acclimated as the agreeable of the "e_name" element.attribute: An XSL element, confined as an achievement statement. It inserts an XML attributewith the defined name into the output. <attribute name="a_name"> XSL statements</attribute>where "a_name" is acclimated as the name of the aspect to be amid into the output. Outputproduced by the amid XSL statements will be acclimated as the amount of the "a_name" attribute.Of course, "attribute" statements can alone be acclimated central an "element" statement. Here is an exampple: <xsl:template match="update"> <xsl:element name="old_update"> <xsl:attribute name="old_date"> ... Read More by user
Tags: content, statements, value, attribute, statement, match, formatting

Tutorial Addendum On XML Technologies - XSL - Formatting Achievement

 The achievement Elementoutput: An XSL element, confined as a arrangement statement. It sets arrangement agreement values to the XSL processor to ascendancy the achievement format. <xsl:output method="xml"/><xsl:output method="html"/><xsl:output method="text"/>where "method" is an aspect acclimated to set the XSL processor s achievement formatting method.It takes one of the afterward 3 frequently acclimated values: xml: Allurement the XSL processor to aftermath achievement in XML format. This is the defaultmethod.html: Allurement the XSL processor to aftermath achievement in HTML 4.0 format.text: Allurement the XSL processor to aftermath achievement in apparent argument format.Let s try "xml" adjustment first with hello_xml.xsl: <?xml version="1.0"?><xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:output method="xml"/> <xsl:template match="p">&lt;/p>Hello world!&lt;p> - From hello.xsl.</xsl:template></xsl:stylesheet>... Read More by user

Tutorial Addendum On XML Technologies - XSD Validation in Java

 Using SAXParserFactory to Amount ParsersXerces-J amalgamation can aswell be loaded by the SAXParserFactory.newInstance()method. Actuality is my SAXValidator.java: /** * SAXValidator.java * Absorb (c) 2002 by Dr. Yang */import java.io.File;import java.io.IOException;import javax.xml.parsers.SAXParserFactory;import javax.xml.parsers.SAXParser;import javax.xml.parsers.ParserConfigurationException;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.SAXParseException;import org.xml.sax.helpers.DefaultHandler;class SAXValidator { accessible changeless abandoned main(String[] args) { Cord schemaFeature = "http://apache.org/xml/features/validation/schema"; try { Book x = new File(args[0]); SAXParserFactory f = SAXParserFactory.newInstance(); System.out.println(f.toString()); f.setValidating(true); f.setFeature(schemaFeature,true); SAXParser p = f.newSAXParser(); System.out.println(p.toString()); DefaultHandler h = new MyErrorHandler(); p.parse(x,h); } bolt (Parse... Read More by user
Tags: program, system, package, features, catch, public

Tutorial Addendum On XML Technologies - XSD Validation in Java

 Validation with XMLReaderUnfortunately, I couldn t acquisition any XML parsers provided in J2SDK 1.4.1_02 that can validate XML anatomy adjoin XSD rules. So I downloaded one of the alotof popular XML parsers in the accessible domain, xerces-j 2.3.0, at: http://xml.apache.org/dist/xerces-j.Once I downloaded Xerces-J-bin.2.3.0.zip, I abashed it into localxerces-2_3_0directory. Create abiding that xercesImpt.jar is in that directory. Now I am accessible to address a simple Java program to use "org.apache.xerces.parsers.SAXParser"to validate any XML files adjoin the defined XSD files: /** * XMLReaderValidator.java * Absorb (c) 2002 by Dr. Yang */import java.io.IOException;import org.xml.sax.XMLReader;import org.xml.sax.helpers.DefaultHandler;import org.xml.sax.helpers.XMLReaderFactory;import org.xml.sax.SAXException;import org.xml.sax.SAXParseException;class XMLReaderValidator { accessible changeless abandoned main(String[] args) { Cord parserClass = "org.apache.xerces.parsers.SAXParser"; ... Read More by user

Tutorial Addendum On XML Technologies - XSD Syntax

 Empty XML ElementsEmpty XML Element: A appropriate circuitous XML aspect that hasone aspect or added and no adolescent argument nodes. Abandoned XML elements mustbe authentic with circuitous data types in the afterward format: <xsd:complexType name="my_data_type"> <xsd:attribute name="attribute_a" type="data_type_a"/> <xsd:attribute name="attribute_b" type="data_type_b"/> ...</xsd:complexType>Anomymous Data TypesIf data blazon is specific to a adolescent aspect in a ancestor data type, and there is notneed to allotment it with data types alfresco the ancestor data type, you can ascertain itas bearding data blazon - a non-named data blazon authentic inline. For example, the following code: <xsd:complexType name="my_data_type"> <xsd:sequence> <xsd:element name="setting"> <xsd:complexType> <xsd:sequence> <xsd:element name="property" type="xsd:string"/> <xsd:element name="value" type="xsd:integer"/> </xsd:sequence> </xsd:complexType> </xsd:element>... Read More by user

Tutorial Addendum On XML Technologies - XSD Syntax

 Simple XML Elements with Continued Data TypesSimple XML Element: An XML aspect that has no adolescent elements and attributes.Simple XML elements can be authentic by using the pre-defined XSD data types. They can aswell be authentic by using continued data types, which are authentic by "simpleType"statements: <xsd:simpleType name="my_type_name"> <xsd:restriction base="xsd:type_name"> XSD angle statements </xsd:restriction></xsd:simpleType><xsd:element name="element_name" type="my_type_name"/>where "element_name" is the name of the XML element, "xsd:type_name" is a pre-defined data blazon confined as the abject data type, and "my_type_name"is the new data blazon continued from the abject data type. Optional angle statements can be amid in the "restriction" account to provideadditional restrictions to the continued data type:xsd:minInclusive - Across-the-board minimum value.xsd:minExclusive - Absolute minumum value.xsd:maxInclusive - Across-the-board best value.xsd:maxExcl... Read More by user

Tutorial Addendum On XML Technologies - XSD Syntax

 Simple XML Elements with Pre-defined Data TypesSimple XML Element: An XML aspect that has no adolescent elements and attributes.Simple XML elements can be authentic in XSD with the afterward statement: <xsd:element name="element_name" type="xsd:type_name"/>where "element_name" is the name of the XML element, and "type_name" is one of the data blazon names pre-defined in XSD.XSD pre-defined data types are disconnected into 7 groups:Numeric data typesDate and time data typesString data typesBinary data typesBoolean data typeNumeric data types: All frequently acclimated accumulation and absolute amount types:xsd:floatxsd:doublexsd:decimalxsd:integerxsd:nonPositiveIntegerxsd:nonNegativeIntegerxsd:negativeIntegerxsd:positiveintegerxsd:longxsd:intxsd:shortxsd:bytexsd:unsignedLongxsd:unsignedIntxsd:unsignedShortxsd:unsignedByteDate and time data types: Date and time accompanying data types. Constants of date and timetypes are accounting in the architecture authentic by ISO 8601. For exampl... Read More by user
Tags: simple, types, month, elements, related, defined, string

Tutorial Addendum On XML Technologies - XML Aisle Accent (XPath)

 Using XPath in XSL TemplatesXPath expressions are acclimated in XSL templates anywhere if the consistent data blazon is allowed.For example: <xsl:template match="LocationPathExpression"><xsl:apply-templates select="LocationPathExpression"/><xsl:value-of select="StringExpression"/><xsl:for-each select="LocationPathExpression"/>Let s analysis my sample XML file, dictionary_xsl.xml: <?xml version="1.0"?><?xml-stylesheet type="text/xsl" href="dictionary.xsl"?><dictionary><!-- dictionary_xsl.xml Absorb (c) 2002 by Dr. Yang--> <word acronym="true"> <name>XML</name> <definition referenece="'s Notes">eXtensible Markup Language.</definition> <update date="2002-12-23"/> </word> <word symbol="true"> <name><</name> <definition>Mathematical attribute apery the "less than" analytic operation, like: 1<2.</definition> <definition>Reserved attribute in XML apery the alpha of tags, like: <![CDATA[<p>Hello world!</p>]]>... Read More by user

Tutorial Addendum On XML Technologies - XML Aisle Accent (XPath)

 Build-in FunctionsCommonly acclimated build-in functions: boolean(number): Allotment true, if the amount is not a zero.boolean(string): Allotment true, if the breadth of the cord is abundant than zero.boolean(node_set): Allotment true, if the set is not empty.concat(string, string, ...): Allotment the chain of all accustomed cord objects.contains(string_1, string_2): Allotment true if the first cord item contains the additional cord object.count(node_set): Allotment the amount of nodes in the accustomed bulge set object.last(): Allotment the ambience admeasurement of the appraisal context.name(): Allotment the able name of the ambience node.name(node_set): Allotment the able name of the first bulge in the accustomed bulge set object.not(boolean): Allotment true, if the accustomed boolean item is false.position(): Allotment the ambience position of the appraisal context.string(): Allotment the cord amount of the ambience node.string(boolean): Allotment true or false based on the accusto... Read More by user
Tags: position, child, language, results, produced, value, location, applied, attribute, matches, string, second, object

Tutorial Addendum On XML Technologies - XML Aisle Accent (XPath)

 What is XML Aisle Accent (XPath)XPath: An announcement appraisal accent to aftermath a amount that represents sub anatomy of an XML structure. You can analyze XPath with approved expression, which is an announcement accent to producea amount that represents sub anatomy of a argument string. You can analyze XPath with the DOS aisle name convention, which is a simple announcement languageto aftermath a amount that represents a sub anatomy of a book system.Writting an XPath announcement involves the afterward aspects:Data types, literals and variablesEvaluation contextOperationsBuild-in functionsXPath is acclimated currently in both XSLT and XPointer.Data Types, Literals and VariablesXPath supports 4 data types: Boolean: A data blazon with two accessible values: true and false.Number: A data blazon apery floating-point numbers with double-precision authentic by IEEE 754.String: A data blazon apery sequences of characters from the aforementioned appearance acclimated by XML.Note set: A dat... Read More by user

Tutorial Addendum On XML Technologies - XML Syntax

 XML Book Syntax RulesSyntax rules of an XML file:Two XML elements can be nested by including one aspect as allotment of the contentof the additional element.There haveto be alone one element, alleged basis element, that is not nested inside any additional elements. There haveto be one "xml" processing apprenticeship afore the basis element.Values of aspect attributes haveto be amid aural two bifold quotes.Element s tag and aspect s name haveto be create of alphanumeric charactersand 4 added characters: "-", "_", ":", and ".". "instructions" in a proceesing apprenticeship haveto be accounting in the syntax asthe attributes of an element. That s it. As I said earlier, XML syntax is actual simple. The "xml" Processing InstructionEvery XML book haveto accommodate one "xml" processing apprenticeship at the alpha ofthe book to acknowledge that this book is a XML file. There is one appropriate aspect for the "xml" processing instruction: version="1.0",indicating the adaptation amount of XML. ... Read More by user
Tags: simple, information, content, attributes, elements, processing, attribute, notes

Tutorial Addendum On XML Technologies - XML Syntax

 Types of Advice in XML FilesThere 6 types of advice in an XML file: 1. Processing Instruction: Acclimated to canyon an apprenticeship to applications that processing this file. Processing instructions are accounting in the afterward syntax: <?target instruction?>where "target" is the name of a ambition accumulation of applications accepted to use thisinstruction, and "instruction" is the absolute apprenticeship to be anesthetized to those applications.2. Comments: Acclimated alone to animadversion the XML file. Comments will be abandoned byapplication that processing this file. Comments are accounting in the afterward syntax: <!--comment-->where "comment" is the argument of comment. 3. XML Elements: Acclimated to present a assemblage of information, with a name, a alternative body, and alternative attributes. Elements are accounting in the afterward syntaxes: <tag/><tag attributes/><tag>content</tag><tag attributes>content</tag>where "tag" is the name of the ele... Read More by user

Tutorial Addendum On XML Technologies - Simple API for XML (SAX)

 What is Simple API for XML (SAX)SAX: An Appliance Programming Interface (API) that allows the parser tofire contest based on the XML anatomy while parsing an XML file. It allows application programs to action the capacity of the XML by administration the contest fired by the parser.SAX has been implemented in Java in J2SDK 1.4.1_01, which is already installed on mysystem. So I am accessible to play with XML files through SAX in Java. SAX Implementations in J2SDKI accept a simple program here, SAXClassChecker.java, to appearance what are the implementation classes for the SAX interfaces: /** * SAXClassChecker.java * Absorb (c) 2002 by Dr. Yang */import java.io.File;import java.io.IOException;import javax.xml.parsers.SAXParserFactory;import javax.xml.parsers.SAXParser;import javax.xml.parsers.ParserConfigurationException;import org.xml.sax.helpers.DefaultHandler;import org.xml.sax.SAXException;class SAXClassChecker { accessible changeless abandoned main(String[] args) { try { Book x = ... Read More by user

 

 

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