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Solved
using <xsl:preserve-space elements="Client_Comment" /> is preserving font
Posted on 2006-10-21
a snippet of the code im using in an xsl stylesheet is:
<xsl:preserve-space elements="Client_Comment" />
<xsl:output method="html"/>
and then:
<pre><xsl:value-of select="./@Client_Comment"
I have done this to preserve carriage returns etc but it seems to be preserving the font and ignroing my style changes.
Is there anyway around this?
<xsl:preserve-space elements="Client_Comment" />
<xsl:output method="html"/>
and then:
<pre><xsl:value-of select="./@Client_Comment"
I have done this to preserve carriage returns etc but it seems to be preserving the font and ignroing my style changes.
Is there anyway around this?
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7 Comments
Active today
Hi scm0sml,
> I have done this to preserve carriage returns
you can't preserve carriage returns in an attribute value.
According to the XML specification,
each XML attribute must be normalized before being sent to the application
Normalisation includes replacing each white-space character with a space
The carriage return is gone before it reaches the XSLT processor
If you want to maintain carriage returns you have to make the string element content
Cheers!
> I have done this to preserve carriage returns
you can't preserve carriage returns in an attribute value.
According to the XML specification,
each XML attribute must be normalized before being sent to the application
Normalisation includes replacing each white-space character with a space
The carriage return is gone before it reaches the XSLT processor
If you want to maintain carriage returns you have to make the string element content
Cheers!
Active today
well,
the XML specification says that a parser must normalize an attribute
before sending it to an application
This means that the parser that gives the parsed XML to the XSLT processor
must do some normalization steps on the attribute value
one of these steps is that every white-space character (tab, carriage return, line-feed, space,...)
will be replaced bay a space
(for a reference read http://www.w3.org/TR/REC-xml/#AVNormalize)
this means that the XSLT processor will never know that a space in an attribute value,
used to be a carriage return,
so whatever you do in your XSLT program, you can't bring the carriage return back
that is why there is a
<xsl:preserve-space elements="..." />
and not
<xsl:preserve-space attributes="..." />
because that makes no sense
the spaces that remain are automatically preserved
So, if you really want to preserve the carriage-returns
you will have to put them in an element instead of an attribute
hope this now explains it well enough
I hope you have access to the source XML file
and you can change it at the source
If you need to convert the attributes to elements
you will have to do that using text processing techniques,
because if you use XML techniques (whatever, DOM, SAX, XSLT,...)
there will be a parser first, and the parser will normalize the attribute value
... back to square root one
I can write you a small Ruby program that does the transform for you,
if you want to
cheers
Geert
Geert
the XML specification says that a parser must normalize an attribute
before sending it to an application
This means that the parser that gives the parsed XML to the XSLT processor
must do some normalization steps on the attribute value
one of these steps is that every white-space character (tab, carriage return, line-feed, space,...)
will be replaced bay a space
(for a reference read http://www.w3.org/TR/REC-xml/#AVNormalize)
this means that the XSLT processor will never know that a space in an attribute value,
used to be a carriage return,
so whatever you do in your XSLT program, you can't bring the carriage return back
that is why there is a
<xsl:preserve-space elements="..." />
and not
<xsl:preserve-space attributes="..." />
because that makes no sense
the spaces that remain are automatically preserved
So, if you really want to preserve the carriage-returns
you will have to put them in an element instead of an attribute
hope this now explains it well enough
I hope you have access to the source XML file
and you can change it at the source
If you need to convert the attributes to elements
you will have to do that using text processing techniques,
because if you use XML techniques (whatever, DOM, SAX, XSLT,...)
there will be a parser first, and the parser will normalize the attribute value
... back to square root one
I can write you a small Ruby program that does the transform for you,
if you want to
cheers
Geert
Geert
how would i go about implementing this ruby program?
i'm viewing the xml in xmlspy incase thats of any use.
i'm viewing the xml in xmlspy incase thats of any use.
Active today
Hi,
switching machines took a bit longer than expected
I have a little Ruby program here that takes the attribute
and puts it in an element with the same name, immedeatly after the opening tag
You can now preserve the spaces in XSLT
what you should do
- download ruby 1.8 and install it (http://www.ruby-lang.org/en/downloads/)
- save the below snippet as a file attr2elem.rb
- run this command-line: ruby attr2elem.rb source.xml > result.xml
note that the source and result xml files can have other names
Here is what you can do then
- get the original XML, transform with the ruby program and then transform in a second step using XSLT with preserve spaces
The Ruby program:
#============
class ReplaceList
def initialize
@for_element = ""
end
def evaluate_tag_content(str)
re = /((Client_Comment)=(["'])(
if md = re.match(str)
@for_element = "<" + md[2] + ">" + md[4] + "</" + md[2] + ">"
"#{ unless md.pre_match.nil?; md.pre_match; else ''; end; }" +
"#{ unless md.post_match.nil?; md.post_match; else ''; end; }"
else
@for_element = ""
str
end
end
def extract_tags(str)
re = /<([^>]+?)>/
if md = re.match(str)
"#{ unless md.pre_match.nil?; md.pre_match; else ''; end; }" +
'<' + evaluate_tag_content(md[1]
"#{ unless md.post_match.nil?; extract_tags(md.post_match
end
end
end
lines = Array.new
while line = gets
lines << line
end
tagger = ReplaceList.new
puts tagger.extract_tags(lines.
switching machines took a bit longer than expected
I have a little Ruby program here that takes the attribute
and puts it in an element with the same name, immedeatly after the opening tag
You can now preserve the spaces in XSLT
what you should do
- download ruby 1.8 and install it (http://www.ruby-lang.org/en/downloads/)
- save the below snippet as a file attr2elem.rb
- run this command-line: ruby attr2elem.rb source.xml > result.xml
note that the source and result xml files can have other names
Here is what you can do then
- get the original XML, transform with the ruby program and then transform in a second step using XSLT with preserve spaces
The Ruby program:
#============
class ReplaceList
def initialize
@for_element = ""
end
def evaluate_tag_content(str)
re = /((Client_Comment)=(["'])(
if md = re.match(str)
@for_element = "<" + md[2] + ">" + md[4] + "</" + md[2] + ">"
"#{ unless md.pre_match.nil?; md.pre_match; else ''; end; }" +
"#{ unless md.post_match.nil?; md.post_match; else ''; end; }"
else
@for_element = ""
str
end
end
def extract_tags(str)
re = /<([^>]+?)>/
if md = re.match(str)
"#{ unless md.pre_match.nil?; md.pre_match; else ''; end; }" +
'<' + evaluate_tag_content(md[1]
"#{ unless md.post_match.nil?; extract_tags(md.post_match
end
end
end
lines = Array.new
while line = gets
lines << line
end
tagger = ReplaceList.new
puts tagger.extract_tags(lines.
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