====== XML ======
  * [[http://www.w3schools.com/xml/xml_whatis.asp|Read the w3school article about XML]] and the try to answer the following questions:
  * What are the required elements of XML file?
  * Does the XML have any predefined tags?
  * Does the XML have any predefined entities?
  * How to define a comment?
  * Is the XML platform dependent?
  * What is a CDATA section in XML file?
  * What is the meaning of the colon within tag name?

===== Simple hierarchy =====
  * Using some text editor, define a relation that describes your faculty:
    * Your XML file should contain information about: name_of_the_faculty, group_id, id_of_the_starosts, firstname, lastname, date_of_birth (day, month, year) address, and more...
  * Try to use your own markup and hierarchy.
<code xml>
<faculty name="air">
    <group id="1" starosts="222222">
        <members>
            <student id="222222">
                <fname>Jan</fname>
                <lname>Kowalski</lname>
                <address>
                    <city>Krakow</city>
                </address>
            </student>
            <student id="222223">
                <fname>Zbigniew</fname>
                <lname>Nowak</lname>
                <address>
                    <city>Wadowice</city>
                </address>
            </student>
        </members>
    </group>
</faculty>
</code>
  * Define at least:
    * two different groups,
    * for each group define at least five members,
    * for each group define the **id** attribute that contains the **id** of the starosts.
  * Your file contains some structured information. \\ Is it possible to change the structure of your XML into another, which contains the same information.
  * What is an empty element?

===== DTD vs. XSD =====
  * First read these two articles about:
    * [[http://www.w3schools.com/dtd/default.asp|DTD]] \\ and
    * [[http://www.w3schools.com/schema/default.asp|XSD]]
  * Choose one of these two validation methods and go to the appropriate section: [[#DTD]] or [[#XSD]]
==== DTD ====
  * Using text editor, try to define a DTD definition for your XML syntax.
  * You can define DTD definition inside XML file: \\ <code>
<?xml version="1.0" ?> 
<!DOCTYPE root [
]>
XML content
</code>
  * Test your XML against defined DTD using [[http://www.xmlvalidation.com/index.php|online validator]] - **it requires embedded DTD**. \\ or
  * You can also test your XML using //xmlstarlet// command: \\ Testing xml file against external DTD definition file use:<code>
xmlstarlet -e -d file.dtd file.xml
</code>or when you use embeded DTD definition use:<code>
xmlstarlet -e -E file.xml
</code>
==== XSD ====
  * Using text editor, try to define a XSD definition for your XML syntax.
  * Test your XML against defined XSD using:
    * [[http://tools.decisionsoft.com/schemaValidate|XSD online validator]] \\ or
    * [[http://www.xmlme.com/Validator.aspx|XML Schema Validator]] \\ or
    * using //xmlstarlet// command:<code>
xmlstarlet -e -s file.xsd file.xml
</code>

===== XPath =====
  * [[http://www.w3schools.com/xpath/default.asp|Read the w3school article about XPath]]
  * Go to [[http://www.xmlme.com/XpathTool.aspx|here]]
  * Using your XML try to:
    * find the lastnames of all students,
    * find all lastnames of members from your group,
    * find an address of the second member from your group,
    * find the all cities of all members,
    * find the all students which are older/younger than you,
    * find a lastname of your group starosts.
===== Summary =====
  * What is the DTD?
  * What is the XSD?
  * Which language (DTD or XSD) is more expressive?
  * What are the drawbacks of DTD in comparison with XSD?
  * How to define an empty element in DTD and XSD?
  * What is the XPath?
  * Does the XPath allow for nested queries?

===== Uwagi =====
  * brak elementarnego wprwadzenia
  * brak linków - materiałów
  * brak choć jednego przykładu step-by-step

===== Komentarze =====

Z braku lepszego miejsca tutaj studenci wpisują komentarze natury ogólnej do tego lab. 8-)