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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Typical sorting and grouping
 taherkordy@xxxxxxxxxxxxxxx wrote on xml-dev:
> [...]
> Suppose we have the following XML file(book.xml)
> [...]
> <?xml version="1.0"?>
> <book>
> <title> Computer Networks </title>
> <category_id> 2 </category_id>
> ...
> </book>
I'm going to interrupt here because you are apparently modeling many book
titles within a single 'book' element. A better schema would be:
<?xml version="1.0"?>
<books>
<book>
<title> Computer Networks </title>
<category_id> 2 </category_id>
</book>
...
</books>
(i.e., multiple 'book' elements in the 'books' document)
> I also have a Parameters table and have extracted values
> for "category" parameter as follows(parameter.xml):
>
> <?xml version="1.0"?>
> <parameter>
> <category>
> <category_item id="1">Art</category_item>
> <category_item id="2">Computer</category_item>
> <category_item id="3">Physics</category_item>
> ..
> </category>
> </parameter>
>
> I want to have the following Html file as the result of
> merging two XML files and an XSL file(what that I want to help me):
>
> <html>
> <body>
> Title :
> <INPUT TYPE='text' NAME='txtTitle' VALUE="Computer Networks" >
> Category:
> <SELECT NAME="category" SIZE=1>
> <OPTION value='1'>Art
> <OPTION value='2' SELECTED>Computer
> <OPTION value='3'>Physics
> </SELECT>
> </body>
> </html>
>
> I have two quietions :
>
> 1. I think that when reading from Book and Parameter
> table, I should make an XML file that have information about
> books and categrory parameters togother.
> [example XML deleted]
>
> I want to know that Is it right this idea ?
This is not necessary. You can access multiple source documents by using
the document() function.
> 2. I want to write an XSL stylesheet for producing this HTML file
> that automatically selects "computer" option in category Combobox
> based on value of "category_id" in book.xml and "id"
> attribute in parameter.xml
The following stylesheet should illustrate the solution.
I am assuming the following things:
- primary source tree is coming from books.xml
- books.xml has each book in its own 'book' element
The complex for-each selection is one way to get the unique categories.
Another way that is more efficient is to use keys and the Muenchian
method, described in the FAQ.
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="html" version="4.0" indent="yes"/>
<xsl:template match="/">
<html>
<head>
<title>books</title>
</head>
<body>
<form action="formDataProcessorURI">
<xsl:apply-templates select="books/book"/>
</form>
</body>
</html>
</xsl:template>
<xsl:template match="book">
<p>
<xsl:text>Title :</xsl:text>
<input type="text" name="txtTitle" value="{normalize-space(title)}"/>
<xsl:text> Category:</xsl:text>
<select name="category" size="1">
<xsl:variable name="category_id" select="normalize-space(category_id)"/>
<!-- iterate thru unique categories -->
<xsl:for-each select="document('parameter.xml')/parameter/category/category_item[not(. = preceding-sibling::category_item)]">
<option value="{position()}">
<xsl:if test="@id = $category_id">
<xsl:attribute name="selected">selected</xsl:attribute>
</xsl:if>
<xsl:value-of select="."/>
</option>
</xsl:for-each>
</select>
</p>
</xsl:template>
</xsl:stylesheet>
- Mike
____________________________________________________________________
Mike J. Brown, software engineer at My XML/XSL resources:
webb.net in Denver, Colorado, USA http://www.skew.org/xml/
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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