XML as Tree Structure (1)

XML as Tree Structure (Rule, Well form dan Valid) Teori dan Praktikum

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Example of an XML Document

Alice Lee [email protected] 212-346-1234 1985-03-22

XML Tree Structure .....

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Contoh : Prolog : • Giada De Laurentiis 2005 30.00 J K. Rowling 2005 29.99 Erik T. Ray 2003 39.95



root element element:

4 child elements: Giada De Laurentiis 2005 30.00 ends the book element:

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XML Syntax Rules • • • • • •

XML Documents Must Have a Root Element The XML Prolog All XML Elements Must Have a Closing Tag XML Tags are Case Sensitive XML Elements Must be Properly Nested XML Attribute Values Must Always be Quoted

• Entity References • • • • •

< > & ' "

< > & ' “

• Comments in XML • • White-space is Preserved in XML • XML → • HTML →

Hello Hello Andi

Andi

• XML Stores New Line as LF • • •

Well Formed XML

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Unix and Mac OSX use LF. Old Mac systems use CR. (\r ascii 13) XML stores a new line as LF (\n ascii 10).

Well Formed XML Documents • An XML document with correct syntax is called "Well Formed". • The syntax rules : • • • • •

XML XML XML XML XML

documents must have a root element elements must have a closing tag tags are case sensitive elements must be properly nested attribute values must be quoted

• XML Errors Will Stop You • Errors in XML documents will stop your XML applications. • HTML browsers are allowed to display HTML documents with errors (like missing end tags).

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Valid XML Documents • A "well formed" XML document is not the same as a "valid" XML document. • A "valid" XML document must be well formed. In addition, it must conform to a document type definition.

• There are two different document type definitions that can be used with XML: • DTD - The original Document Type Definition • XML Schema - An XML-based alternative to DTD

• A document type definition defines the rules and the legal elements and attributes for an XML document.

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VS code – Extensions for XML

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Ctrl + Shift + P

• Open XML Documents

• Perhatikan dan pelajari User Guide – XML Validation Page 9

Cobakan file xml berikut, capture pesan error/problem : Check1.xml Tove Jani Reminder Don't forget me this weekend!

Check2.xml Tove Jani Reminder Don't forget me this weekend! Page 10

Check3.xml

Cobakan file xml dengan validasi xtd berikut : Note.xml Tove Jani Reminder Don't forget me this weekend!

Note.dtd Tove Jani Reminder Don't forget me this weekend!

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Tugas Praktikum • Menulis Langkah instalasi extension xml di vs code (extension apa saja) • File : checkx.xml di atas dan hasil capture pesan errornya dalam word • Hasil percobaan xml dengan file validasi dtd nya. (file dan capture)

https://github.com/redhat-developer/vscode-xml/blob/master/docs/Validation.md#validation-withxsd-grammar

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