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Posted to taglibs-user@tomcat.apache.org by Neil Zanella <nz...@cs.mun.ca> on 2003/06/29 12:00:32 UTC
Jakarta Taglibs Installation
Hello,
I have installed Jakarta Tomcat 4.1.24 and Jakarta Taglibs 1.0.3,
both of which support the JSP specification. I found the README
file /usr/local/jakarta-taglibs/standard-1.0.3/README to be
close to useless: it seems to me that copying the files
standard-doc.war and standard-examples.war to the
WEB-INF/classes is almost irrelevant: what do I
do once I copy them? How do I test them?
With a JavaServer page with the following directive:
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>
I was getting the following error:
uri (http://java.sun.com/jstl/core) cannot be resolved
and then also the error:
org.apache.jasper.JasperException: File "/WEB-INF/c.tld" not found
Hence I fixed it with:
$ cp /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld \
~/public_html/WEB-INF
This is undocumented though. Is it what I'm supposed to do?
Seems strange to me that I would have to copy the file to
my web applications' WEB-INF directory: if it's the same
for everyone why can't it be used as a system file,
without the need to copy it?
Thanks,
Neil
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Re: Jakarta Taglibs Installation
Posted by Shawn Bayern <ba...@essentially.net>.
On Sun, 29 Jun 2003, Michael Duffy wrote:
> Actually, step 3. is unnecessary. When you create the JAR file for
> your handler, the TLD file goes inside it. It's already got the URI
> string you should use in your JSP. When the JSP compiler goes looking
> for your TLD, it'll find it in the JAR because it's already in the
> CLASSPATH.
Indeed, under JSP 1.2, the <taglib> element is unnecessary.
As for duplicating the JAR files for each application, it's simply the
cost -- and an exceedingly minor one in any reasonable environment -- of
appropriate architecture. The advantages of including JAR files with an
individual application include
- a clear statement of the dependencies of the application and the
ability to easily WAR it up and redeploy elsewhere
- automatic detection of the JAR files' taglibs
- isolation of 'static' data from other applications because a
classloader specific to the web application loads the JAR files'
classes; this can be important for security and for troubleshooting
Shawn
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Re: Jakarta Taglibs Installation
Posted by Michael Duffy <du...@yahoo.com>.
I should point out, in the interest of intellectual
honesty, that I didn't lick this off the grass. I
learned it after reading a well-written explanation by
Shawn Bayern. Proper credit should be given where it
belongs. - MOD
--- guo yingshou <gu...@yahoo.com.cn> wrote:
> Thanks for your info. I never do that before.Maybe I
> need to have a detailed look at the sections you
> mentions if I have time later.After a glimpse of
> these
> lines,a question pops up my mind:
> If it is *mandatory*,why the web-app.dtd still
> specifiy an optional taglib element?Just for
> backward
> compatibility?
>
> Anyway,thanks for clarification.
>
> --- Shawn Bayern <ba...@essentially.net> �����ģ�>
> On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
> >
> > > Are you sure it works on all j2ee complaint
> > servlet engine?
> >
> > The behavior is mandated by sections 7.2.1 and
> 7.3.1
> > of the JSP 1.2
> > specification, so all compliant containers support
> > it; if a product
> > claiming compliance doesn't support it, then it's
> a
> > bug.
> >
> > Shawn
> >
> >
> >
>
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> >
>
>
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Re: Whitespace Galore!
Posted by Neil Zanella <nz...@cs.mun.ca>.
On Mon, 30 Jun 2003, Rick Ross wrote:
> 2. There is a ton of whitespace all over my output. Many many newlines ...
> so many, that it is hard to examine the source of the output. I think that
> most of it is in the bodies of conditionals... anyone else having
> problems?
Yes!!! This is the one feature I miss the very most about PHP tags, which,
are such that an entire line enclosed within <?php /* ... */ ?> will be
stripped off together with the newline character that follows it for
pretty output! I really cannot understand why JSP doesn't do this
and hope that this will change in the future:
Q: How can you tell a page is written with JSP?
A: If when you view page source in your web browser you see that there are
a lot of runs of consecutive blank lines! It looks sloppy!!! ... and is
unfriendly and makes the output hard to debug and read!
There must be a way around it; there must, otherwise JSP sucks.
So how can it be achieved?
Regards,
Neil
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Whitespace Galore!
Posted by Rick Ross <rr...@stupendousman.com>.
Hi all,
I've been running into two little oddities that I thought might be worth
some discussion.
1. I was not able to redirect a page based on a JSTL condition tag (c:if,
c:choose, etc.) because the tags themselves would invariably pump some
\r\n's into the page. This of course, caused a commit on the output stream
which disallowed any redirect actions. So basically something like
<c:if test="${true}">
<c:redirect url="otherplace.html" />
</c:if>
Will never redirect.
Now, remember that the code above is actually the same as :
<c:if test="${true}">[crlf][space][space][space]<c:redirect
url="otherplace.html" />[crlf]
</c:if>[crlf]
Even so, if leave you out the extra whitespace, like so:
<c:if test="${true}"><c:redirect url="otherplace.html" /></c:if>
It will still fail. taking a look at the _jsp.java file shows the culprit.
Very early on, a \r\n combo gets written to the output stream. Naturally, I
have buffering set and autoFlush off.
Of course there are a dozen ways around this, so it's no big deal, but I
doubt that it is intentional and extra whitespace is my second point.
2. There is a ton of whitespace all over my output. Many many newlines ...
so many, that it is hard to examine the source of the output. I think that
most of it is in the bodies of conditionals... anyone else having
problems?
Rick Ross
"Any sufficiently complex technology is indistinguishable from
garbage"
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Re: Jakarta Taglibs Installation
Posted by Neil Zanella <nz...@cs.mun.ca>.
Ooops,
I just noticed that when I uploaded my file to the validator the offending
elements were commented-out inside <!-- and --> tokens. Uncommenting and a
closer look at the DTD revealed that the <context-param>, while a child of
the correct parent node, did not occur in the right order it must occur
in the order specified by the following part of the DTD:
<!ELEMENT web-app (icon?, display-name?, description?, distributable?,
context-param*, servlet*, servlet-mapping*, session-config?,
mime-mapping*, welcome-file-list?, error-page*, taglib*,
resource-ref*, security-constraint*, login-config?, security-role*,
env-entry*, ejb-ref*)>
... so I put it after the description (as I do not have the optional
distributable element in my web.xml file: I don't use it).
Now that I fixed that the error is gone!
Thanks!
Neil
On Sun, 6 Jul 2003, Neil Zanella wrote:
>
> Excellent idea. I should have a look at the document type definition for
> the web.xml file to find out where exactly I should place the
> context-param element and its contents, and then perhaps also
> validate the resulting XML file with an XML validator with
> the DTD also supplied as input.
>
> The DTD does not come with tomcat or taglibs but...
>
> $ find /usr/local/jakarta-tomcat-4.1.24 -name '*dtd'
> $ find /usr/local/jakarta-taglibs -name '*dtd'
> $
>
> The file /usr/local/jakarta-tomcat-4.1.24/webapps/ROOT/WEB-INF/web.xml
> reveals its location:
>
> http://java.sun.com/dtd/web-app_2_3.dtd
>
> OK, I validated the page versus the DTD using the XML validator at
> http://validator.w3.org/ and found the page to be valid XML, that
> is the XML file is well-formed and validates versus the DTD.
>
> I also checked it at the following site:
> http://www.stg.brown.edu/cgi-bin/xmlvalid/xmlvalid.pl
> and obtained the same results (except for the following
> warning which I suppose is nothing to worry about):
>
> line 2, web.xml:
> warning (562): can't resolve Public ID: -//Sun Microsystems, Inc.//DTD
> Web Application 2.2//EN
>
> Both validators nevertheless downloaded the DTD from the contents of
> the second string specified in the document type declaration and did
> find the document to conform to the DTD, so that was not the problem.
>
> The error message reported is clearly wrong.
>
> Regards,
>
> Neil
>
> On Sat, 5 Jul 2003, N. Chen wrote:
>
> > do you have <taglib> define in the web.xml file? might be the ordering of
> > your other directives, try looking at the DTD.
> >
> > nick
> >
> > On Fri, 4 Jul 2003, Neil Zanella wrote:
> >
> > >
> > > Well, now I am not entirely sure that it is mandatory, because I have
> > > a JSP page such that when I change the WEB-INF/web.xml to include the
> > > following lines (for connecting to a database which is not yet on the
> > > network):
> > >
> > > <context-param>
> > > <param-name>
> > > javax.servlet.jsp.jstl.sql.dataSource
> > > </param-name>
> > > <param-value>
> > > jdbc:postgresql:foodb,org.postgresql.Driver,johndoe
> > > </param-value>
> > > </context-param>
> > >
> > > and save the .jsp file without making any modifications to it, I get
> > > the following error, but the error is not caused by a change in the
> > > .jsp file; it's caused by the above lines:
> > >
> > > org.apache.jasper.JasperException: This absolute uri
> > > (http://java.sun.com/jstl/core) cannot be resolved in either web.xml or
> > > the jar files deployed with this application
> > >
> > > This is clearly wrong!!! BTW I have not been able to connect to the data
> > > source yet so I'm not sure yet if that would fix it, but the error is
> > > clearly the wrong error, and is introduced by the above lines.
> > >
> > > Why is this happening? (almost would seem like a bug: Tomcat 4.1.24)
> > >
> > > Neil
> > >
> > > On Mon, 30 Jun 2003, Shawn Bayern wrote:
> > >
> > > > On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
> > > >
> > > > > If it is *mandatory*,why the web-app.dtd still specifiy an optional
> > > > > taglib element?Just for backward compatibility?
> > > >
> > > > That's part of it, and it's also necessary for cases where a tag library
> > > > doesn't package its JAR in the format necessary for it to work. Note that
> > > > it's mandatory for the container to support it; it's not mandatory for a
> > > > taglib author to deploy his or her libraries in this fashion (though it's
> > > > probably a good idea in all cases).
> > > >
> > > >
> > >
> > >
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: taglibs-user-unsubscribe@jakarta.apache.org
> > > For additional commands, e-mail: taglibs-user-help@jakarta.apache.org
> > >
> > >
> >
> >
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> >
>
>
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Re: Jakarta Taglibs Installation
Posted by Neil Zanella <nz...@cs.mun.ca>.
Excellent idea. I should have a look at the document type definition for
the web.xml file to find out where exactly I should place the
context-param element and its contents, and then perhaps also
validate the resulting XML file with an XML validator with
the DTD also supplied as input.
The DTD does not come with tomcat or taglibs but...
$ find /usr/local/jakarta-tomcat-4.1.24 -name '*dtd'
$ find /usr/local/jakarta-taglibs -name '*dtd'
$
The file /usr/local/jakarta-tomcat-4.1.24/webapps/ROOT/WEB-INF/web.xml
reveals its location:
http://java.sun.com/dtd/web-app_2_3.dtd
OK, I validated the page versus the DTD using the XML validator at
http://validator.w3.org/ and found the page to be valid XML, that
is the XML file is well-formed and validates versus the DTD.
I also checked it at the following site:
http://www.stg.brown.edu/cgi-bin/xmlvalid/xmlvalid.pl
and obtained the same results (except for the following
warning which I suppose is nothing to worry about):
line 2, web.xml:
warning (562): can't resolve Public ID: -//Sun Microsystems, Inc.//DTD
Web Application 2.2//EN
Both validators nevertheless downloaded the DTD from the contents of
the second string specified in the document type declaration and did
find the document to conform to the DTD, so that was not the problem.
The error message reported is clearly wrong.
Regards,
Neil
On Sat, 5 Jul 2003, N. Chen wrote:
> do you have <taglib> define in the web.xml file? might be the ordering of
> your other directives, try looking at the DTD.
>
> nick
>
> On Fri, 4 Jul 2003, Neil Zanella wrote:
>
> >
> > Well, now I am not entirely sure that it is mandatory, because I have
> > a JSP page such that when I change the WEB-INF/web.xml to include the
> > following lines (for connecting to a database which is not yet on the
> > network):
> >
> > <context-param>
> > <param-name>
> > javax.servlet.jsp.jstl.sql.dataSource
> > </param-name>
> > <param-value>
> > jdbc:postgresql:foodb,org.postgresql.Driver,johndoe
> > </param-value>
> > </context-param>
> >
> > and save the .jsp file without making any modifications to it, I get
> > the following error, but the error is not caused by a change in the
> > .jsp file; it's caused by the above lines:
> >
> > org.apache.jasper.JasperException: This absolute uri
> > (http://java.sun.com/jstl/core) cannot be resolved in either web.xml or
> > the jar files deployed with this application
> >
> > This is clearly wrong!!! BTW I have not been able to connect to the data
> > source yet so I'm not sure yet if that would fix it, but the error is
> > clearly the wrong error, and is introduced by the above lines.
> >
> > Why is this happening? (almost would seem like a bug: Tomcat 4.1.24)
> >
> > Neil
> >
> > On Mon, 30 Jun 2003, Shawn Bayern wrote:
> >
> > > On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
> > >
> > > > If it is *mandatory*,why the web-app.dtd still specifiy an optional
> > > > taglib element?Just for backward compatibility?
> > >
> > > That's part of it, and it's also necessary for cases where a tag library
> > > doesn't package its JAR in the format necessary for it to work. Note that
> > > it's mandatory for the container to support it; it's not mandatory for a
> > > taglib author to deploy his or her libraries in this fashion (though it's
> > > probably a good idea in all cases).
> > >
> > >
> >
> >
> > ---------------------------------------------------------------------
> > To unsubscribe, e-mail: taglibs-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail: taglibs-user-help@jakarta.apache.org
> >
> >
>
>
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Re: Jakarta Taglibs Installation
Posted by "N. Chen" <ni...@u.washington.edu>.
do you have <taglib> define in the web.xml file? might be the ordering of
your other directives, try looking at the DTD.
nick
On Fri, 4 Jul 2003, Neil Zanella wrote:
>
> Well, now I am not entirely sure that it is mandatory, because I have
> a JSP page such that when I change the WEB-INF/web.xml to include the
> following lines (for connecting to a database which is not yet on the
> network):
>
> <context-param>
> <param-name>
> javax.servlet.jsp.jstl.sql.dataSource
> </param-name>
> <param-value>
> jdbc:postgresql:foodb,org.postgresql.Driver,johndoe
> </param-value>
> </context-param>
>
> and save the .jsp file without making any modifications to it, I get
> the following error, but the error is not caused by a change in the
> .jsp file; it's caused by the above lines:
>
> org.apache.jasper.JasperException: This absolute uri
> (http://java.sun.com/jstl/core) cannot be resolved in either web.xml or
> the jar files deployed with this application
>
> This is clearly wrong!!! BTW I have not been able to connect to the data
> source yet so I'm not sure yet if that would fix it, but the error is
> clearly the wrong error, and is introduced by the above lines.
>
> Why is this happening? (almost would seem like a bug: Tomcat 4.1.24)
>
> Neil
>
> On Mon, 30 Jun 2003, Shawn Bayern wrote:
>
> > On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
> >
> > > If it is *mandatory*,why the web-app.dtd still specifiy an optional
> > > taglib element?Just for backward compatibility?
> >
> > That's part of it, and it's also necessary for cases where a tag library
> > doesn't package its JAR in the format necessary for it to work. Note that
> > it's mandatory for the container to support it; it's not mandatory for a
> > taglib author to deploy his or her libraries in this fashion (though it's
> > probably a good idea in all cases).
> >
> >
>
>
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>
>
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Re: Jakarta Taglibs Installation
Posted by Neil Zanella <nz...@cs.mun.ca>.
Well, now I am not entirely sure that it is mandatory, because I have
a JSP page such that when I change the WEB-INF/web.xml to include the
following lines (for connecting to a database which is not yet on the
network):
<context-param>
<param-name>
javax.servlet.jsp.jstl.sql.dataSource
</param-name>
<param-value>
jdbc:postgresql:foodb,org.postgresql.Driver,johndoe
</param-value>
</context-param>
and save the .jsp file without making any modifications to it, I get
the following error, but the error is not caused by a change in the
.jsp file; it's caused by the above lines:
org.apache.jasper.JasperException: This absolute uri
(http://java.sun.com/jstl/core) cannot be resolved in either web.xml or
the jar files deployed with this application
This is clearly wrong!!! BTW I have not been able to connect to the data
source yet so I'm not sure yet if that would fix it, but the error is
clearly the wrong error, and is introduced by the above lines.
Why is this happening? (almost would seem like a bug: Tomcat 4.1.24)
Neil
On Mon, 30 Jun 2003, Shawn Bayern wrote:
> On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
>
> > If it is *mandatory*,why the web-app.dtd still specifiy an optional
> > taglib element?Just for backward compatibility?
>
> That's part of it, and it's also necessary for cases where a tag library
> doesn't package its JAR in the format necessary for it to work. Note that
> it's mandatory for the container to support it; it's not mandatory for a
> taglib author to deploy his or her libraries in this fashion (though it's
> probably a good idea in all cases).
>
>
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Re: Jakarta Taglibs Installation
Posted by Shawn Bayern <ba...@essentially.net>.
On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
> If it is *mandatory*,why the web-app.dtd still specifiy an optional
> taglib element?Just for backward compatibility?
That's part of it, and it's also necessary for cases where a tag library
doesn't package its JAR in the format necessary for it to work. Note that
it's mandatory for the container to support it; it's not mandatory for a
taglib author to deploy his or her libraries in this fashion (though it's
probably a good idea in all cases).
--
Shawn Bayern
"JSTL in Action" http://www.jstlbook.com
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Re: Jakarta Taglibs Installation
Posted by guo yingshou <gu...@yahoo.com.cn>.
Thanks for your info. I never do that before.Maybe I
need to have a detailed look at the sections you
mentions if I have time later.After a glimpse of these
lines,a question pops up my mind:
If it is *mandatory*,why the web-app.dtd still
specifiy an optional taglib element?Just for backward
compatibility?
Anyway,thanks for clarification.
--- Shawn Bayern <ba...@essentially.net> 的正文：>
On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
>
> > Are you sure it works on all j2ee complaint
> servlet engine?
>
> The behavior is mandated by sections 7.2.1 and 7.3.1
> of the JSP 1.2
> specification, so all compliant containers support
> it; if a product
> claiming compliance doesn't support it, then it's a
> bug.
>
> Shawn
>
>
>
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Re: Jakarta Taglibs Installation
Posted by Shawn Bayern <ba...@essentially.net>.
On Mon, 30 Jun 2003, [gb2312] guo yingshou wrote:
> Are you sure it works on all j2ee complaint servlet engine?
The behavior is mandated by sections 7.2.1 and 7.3.1 of the JSP 1.2
specification, so all compliant containers support it; if a product
claiming compliance doesn't support it, then it's a bug.
Shawn
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Re: Jakarta Taglibs Installation
Posted by guo yingshou <gu...@yahoo.com.cn>.
Are you sure it works on all j2ee complaint servlet
engine?
thanks.
--- Michael Duffy <du...@yahoo.com> 的正文：>
> Actually, step 3. is unnecessary. When you create
> the
> JAR file for your handler, the TLD file goes inside
> it. It's already got the URI string you should use
> in
> your JSP. When the JSP compiler goes looking for
> your
> TLD, it'll find it in the JAR because it's already
> in
> the CLASSPATH.
>
> That's the way I always do it with JSTL. I like it,
> because it doesn't violate the DRY principle. Why
> have the URI in the TLD and the WAR file? Don't
> Repeat Yourself. JMHO - MOD
>
> --- guo yingshou <gu...@yahoo.com.cn> wrote:
> > to develop and use jsp custome tag library,one
> > usually
> > follows this roadmap:
> >
> > 1.write your tag handler(s).
> > 2.write your tld file(s);
> > 3.in your web.xml,declare that you want to use the
> > lib
> > in this way:
> >
> > <web-app>
> > ...
> >
> > <taglib>
> > <taglib-uri>*****</taglib-uri>
> > <taglib-location>***</taglib-location>
> > </taglib>
> > ....
> >
> > </web-app>
> >
> > 4.in you jsp page:
> >
> > <%@ taglib uri="***" prefix="***" %>
> >
> > that's all.
> >
> >
> >
> >
> >
> > --- Neil Zanella <nz...@cs.mun.ca> 的正文：>
> > > Well, I just had a look at the instructions at:
> > >
> > >
> >
>
http://jakarta.apache.org/taglibs/doc/standard-doc/standard/GettingStarted.html
> > > and they say to copy the contents of directory:
> > >
> > > /usr/local/jakarta-taglibs/standard-1.0.3/lib
> > >
> > > to the WEB-INF/lib directory. That worked, but
> > > once again, it seems wasteful. If every user
> > > did this for their own web application directory
> > > then there would be a lot of unnecessary
> > > duplication.
> > > Did you say that I can avoid this by using the
> > > <taglib> element in my web.xml (server.xml?).
> > >
> > > Thanks,
> > >
> > > Neil
> > >
> > > (Now I'll also have a look at:
> > >
> >
> http://jakarta.apache.org/taglibs/binarydist.html)_
> > >
> > > I cannot understand why these jakarta packages
> > can't
> > > just distribute whatever installation
> instructions
> > > are necessary in the README file like just about
> > > any other software does it.
> > >
> > > ...
> > >
> > > On Sun, 29 Jun 2003, [gb2312] guo yingshou
> wrote:
> > >
> > > > Have a look at servlet specification.
> > > >
> > > > --- Neil Zanella <nz...@cs.mun.ca>
> 的正文：>
> >
> > > > > On Sun, 29 Jun 2003, [gb2312] guo yingshou
> > > wrote:
> > > > >
> > > > > > Have you configured the taglib in your
> > web.xml
> > > > > using
> > > > > > <taglib> element ?
> > > > >
> > > > > No I have not because:
> > > > >
> > > > > 1. I have not seen anything about this in
> the
> > > > > documentation.
> > > > >
> > > > > 2. I have read that Tomcat 4.1.24 has an
> > > > > "autodetection feature"
> > > > > which makes this unnecessary.
> > > > >
> > > > > In case 2 is not true, then where can I find
> > > > > documentation on the
> > > > > syntax of this <taglib> XML element and what
> > > > > attributes/contents
> > > > > should I set for this element?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Neil
> > > > >
> > > > > > --- Neil Zanella <nz...@cs.mun.ca>
> > > 的正文：>
> > > > > > > Hello,
> > > > > > >
> > > > > > > I have installed Jakarta Tomcat 4.1.24
> and
> > > > > Jakarta
> > > > > > > Taglibs 1.0.3,
> > > > > > > both of which support the JSP
> > specification.
> > > I
> > > > > found
> > > > > > > the README
> > > > > > > file
> > > > > > >
> > > /usr/local/jakarta-taglibs/standard-1.0.3/README
> > > > > to
> > > > > > > be
> > > > > > > close to useless: it seems to me that
> > > copying
> > > > > the
> > > > > > > files
> > > > > > > standard-doc.war and
> standard-examples.war
> > > to
> > > > > the
> > > > > > > WEB-INF/classes is almost irrelevant:
> what
> > > do I
> > > > > > > do once I copy them? How do I test them?
> > > > > > >
> > > > > > > With a JavaServer page with the
> following
> > > > > directive:
> > > > > > >
> > > > > > > <%@ taglib prefix="c"
> > > > > > > uri="http://java.sun.com/jstl/core" %>
> > > > > > >
> > > > > > > I was getting the following error:
> > > > > > >
> > > > > > > uri (http://java.sun.com/jstl/core)
> cannot
> > > be
> > > > > > > resolved
> > > > > > >
> > > > > > > and then also the error:
> > > > > > >
> > > > > > > org.apache.jasper.JasperException: File
> > > > > > > "/WEB-INF/c.tld" not found
> > > > > > >
> > > > > > > Hence I fixed it with:
> > > > > > >
> > > > > > > $ cp
> > > > > > >
> > > > >
> > >
> >
> /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld
> > > > > > > \
> > > > > > > ~/public_html/WEB-INF
> > > > > > >
> > > > > > > This is undocumented though. Is it what
> > I'm
> > > > > supposed
> > > > > > > to do?
> > > > > > > Seems strange to me that I would have to
> > > copy
> > > > > the
> > > > > > > file to
> > > > > > > my web applications' WEB-INF directory:
> if
> > > it's
> > > > > the
> > > > > > > same
> > > > > > > for everyone why can't it be used as a
> > > system
> > > > > file,
> > > > > > > without the need to copy it?
> > > > > > >
> > > > > > > Thanks,
>
=== message truncated ===
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Re: Jakarta Taglibs Installation
Posted by Michael Duffy <du...@yahoo.com>.
Actually, step 3. is unnecessary. When you create the
JAR file for your handler, the TLD file goes inside
it. It's already got the URI string you should use in
your JSP. When the JSP compiler goes looking for your
TLD, it'll find it in the JAR because it's already in
the CLASSPATH.
That's the way I always do it with JSTL. I like it,
because it doesn't violate the DRY principle. Why
have the URI in the TLD and the WAR file? Don't
Repeat Yourself. JMHO - MOD
--- guo yingshou <gu...@yahoo.com.cn> wrote:
> to develop and use jsp custome tag library,one
> usually
> follows this roadmap:
>
> 1.write your tag handler(s).
> 2.write your tld file(s);
> 3.in your web.xml,declare that you want to use the
> lib
> in this way:
>
> <web-app>
> ...
>
> <taglib>
> <taglib-uri>*****</taglib-uri>
> <taglib-location>***</taglib-location>
> </taglib>
> ....
>
> </web-app>
>
> 4.in you jsp page:
>
> <%@ taglib uri="***" prefix="***" %>
>
> that's all.
>
>
>
>
>
> --- Neil Zanella <nz...@cs.mun.ca> �����ģ�>
> > Well, I just had a look at the instructions at:
> >
> >
>
http://jakarta.apache.org/taglibs/doc/standard-doc/standard/GettingStarted.html
> > and they say to copy the contents of directory:
> >
> > /usr/local/jakarta-taglibs/standard-1.0.3/lib
> >
> > to the WEB-INF/lib directory. That worked, but
> > once again, it seems wasteful. If every user
> > did this for their own web application directory
> > then there would be a lot of unnecessary
> > duplication.
> > Did you say that I can avoid this by using the
> > <taglib> element in my web.xml (server.xml?).
> >
> > Thanks,
> >
> > Neil
> >
> > (Now I'll also have a look at:
> >
> http://jakarta.apache.org/taglibs/binarydist.html)_
> >
> > I cannot understand why these jakarta packages
> can't
> > just distribute whatever installation instructions
> > are necessary in the README file like just about
> > any other software does it.
> >
> > ...
> >
> > On Sun, 29 Jun 2003, [gb2312] guo yingshou wrote:
> >
> > > Have a look at servlet specification.
> > >
> > > --- Neil Zanella <nz...@cs.mun.ca> �����ģ�>
>
> > > > On Sun, 29 Jun 2003, [gb2312] guo yingshou
> > wrote:
> > > >
> > > > > Have you configured the taglib in your
> web.xml
> > > > using
> > > > > <taglib> element ?
> > > >
> > > > No I have not because:
> > > >
> > > > 1. I have not seen anything about this in the
> > > > documentation.
> > > >
> > > > 2. I have read that Tomcat 4.1.24 has an
> > > > "autodetection feature"
> > > > which makes this unnecessary.
> > > >
> > > > In case 2 is not true, then where can I find
> > > > documentation on the
> > > > syntax of this <taglib> XML element and what
> > > > attributes/contents
> > > > should I set for this element?
> > > >
> > > > Thanks,
> > > >
> > > > Neil
> > > >
> > > > > --- Neil Zanella <nz...@cs.mun.ca>
> > �����ģ�>
> > > > > > Hello,
> > > > > >
> > > > > > I have installed Jakarta Tomcat 4.1.24 and
> > > > Jakarta
> > > > > > Taglibs 1.0.3,
> > > > > > both of which support the JSP
> specification.
> > I
> > > > found
> > > > > > the README
> > > > > > file
> > > > > >
> > /usr/local/jakarta-taglibs/standard-1.0.3/README
> > > > to
> > > > > > be
> > > > > > close to useless: it seems to me that
> > copying
> > > > the
> > > > > > files
> > > > > > standard-doc.war and standard-examples.war
> > to
> > > > the
> > > > > > WEB-INF/classes is almost irrelevant: what
> > do I
> > > > > > do once I copy them? How do I test them?
> > > > > >
> > > > > > With a JavaServer page with the following
> > > > directive:
> > > > > >
> > > > > > <%@ taglib prefix="c"
> > > > > > uri="http://java.sun.com/jstl/core" %>
> > > > > >
> > > > > > I was getting the following error:
> > > > > >
> > > > > > uri (http://java.sun.com/jstl/core) cannot
> > be
> > > > > > resolved
> > > > > >
> > > > > > and then also the error:
> > > > > >
> > > > > > org.apache.jasper.JasperException: File
> > > > > > "/WEB-INF/c.tld" not found
> > > > > >
> > > > > > Hence I fixed it with:
> > > > > >
> > > > > > $ cp
> > > > > >
> > > >
> >
> /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld
> > > > > > \
> > > > > > ~/public_html/WEB-INF
> > > > > >
> > > > > > This is undocumented though. Is it what
> I'm
> > > > supposed
> > > > > > to do?
> > > > > > Seems strange to me that I would have to
> > copy
> > > > the
> > > > > > file to
> > > > > > my web applications' WEB-INF directory: if
> > it's
> > > > the
> > > > > > same
> > > > > > for everyone why can't it be used as a
> > system
> > > > file,
> > > > > > without the need to copy it?
> > > > > >
> > > > > > Thanks,
> > > > > >
> > > > > > Neil
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
---------------------------------------------------------------------
> > > > > > To unsubscribe, e-mail:
> > > > > >
> taglibs-user-unsubscribe@jakarta.apache.org
> > > > > > For additional commands, e-mail:
> > > > > > taglibs-user-help@jakarta.apache.org
> > > > > >
> > > > >
> > > > >
> > > >
> > >
> >
>
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> > >
> >
>
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> > > >
> > >
> >
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> > >
> >
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Re: Jakarta Taglibs Installation
Posted by guo yingshou <gu...@yahoo.com.cn>.
to develop and use jsp custome tag library,one usually
follows this roadmap:
1.write your tag handler(s).
2.write your tld file(s);
3.in your web.xml,declare that you want to use the lib
in this way:
<web-app>
...
<taglib>
<taglib-uri>*****</taglib-uri>
<taglib-location>***</taglib-location>
</taglib>
....
</web-app>
4.in you jsp page:
<%@ taglib uri="***" prefix="***" %>
that's all.
--- Neil Zanella <nz...@cs.mun.ca> 的正文：>
> Well, I just had a look at the instructions at:
>
>
http://jakarta.apache.org/taglibs/doc/standard-doc/standard/GettingStarted.html
> and they say to copy the contents of directory:
>
> /usr/local/jakarta-taglibs/standard-1.0.3/lib
>
> to the WEB-INF/lib directory. That worked, but
> once again, it seems wasteful. If every user
> did this for their own web application directory
> then there would be a lot of unnecessary
> duplication.
> Did you say that I can avoid this by using the
> <taglib> element in my web.xml (server.xml?).
>
> Thanks,
>
> Neil
>
> (Now I'll also have a look at:
> http://jakarta.apache.org/taglibs/binarydist.html)_
>
> I cannot understand why these jakarta packages can't
> just distribute whatever installation instructions
> are necessary in the README file like just about
> any other software does it.
>
> ...
>
> On Sun, 29 Jun 2003, [gb2312] guo yingshou wrote:
>
> > Have a look at servlet specification.
> >
> > --- Neil Zanella <nz...@cs.mun.ca> 的正文：>
> > > On Sun, 29 Jun 2003, [gb2312] guo yingshou
> wrote:
> > >
> > > > Have you configured the taglib in your web.xml
> > > using
> > > > <taglib> element ?
> > >
> > > No I have not because:
> > >
> > > 1. I have not seen anything about this in the
> > > documentation.
> > >
> > > 2. I have read that Tomcat 4.1.24 has an
> > > "autodetection feature"
> > > which makes this unnecessary.
> > >
> > > In case 2 is not true, then where can I find
> > > documentation on the
> > > syntax of this <taglib> XML element and what
> > > attributes/contents
> > > should I set for this element?
> > >
> > > Thanks,
> > >
> > > Neil
> > >
> > > > --- Neil Zanella <nz...@cs.mun.ca>
> 的正文：>
> > > > > Hello,
> > > > >
> > > > > I have installed Jakarta Tomcat 4.1.24 and
> > > Jakarta
> > > > > Taglibs 1.0.3,
> > > > > both of which support the JSP specification.
> I
> > > found
> > > > > the README
> > > > > file
> > > > >
> /usr/local/jakarta-taglibs/standard-1.0.3/README
> > > to
> > > > > be
> > > > > close to useless: it seems to me that
> copying
> > > the
> > > > > files
> > > > > standard-doc.war and standard-examples.war
> to
> > > the
> > > > > WEB-INF/classes is almost irrelevant: what
> do I
> > > > > do once I copy them? How do I test them?
> > > > >
> > > > > With a JavaServer page with the following
> > > directive:
> > > > >
> > > > > <%@ taglib prefix="c"
> > > > > uri="http://java.sun.com/jstl/core" %>
> > > > >
> > > > > I was getting the following error:
> > > > >
> > > > > uri (http://java.sun.com/jstl/core) cannot
> be
> > > > > resolved
> > > > >
> > > > > and then also the error:
> > > > >
> > > > > org.apache.jasper.JasperException: File
> > > > > "/WEB-INF/c.tld" not found
> > > > >
> > > > > Hence I fixed it with:
> > > > >
> > > > > $ cp
> > > > >
> > >
> /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld
> > > > > \
> > > > > ~/public_html/WEB-INF
> > > > >
> > > > > This is undocumented though. Is it what I'm
> > > supposed
> > > > > to do?
> > > > > Seems strange to me that I would have to
> copy
> > > the
> > > > > file to
> > > > > my web applications' WEB-INF directory: if
> it's
> > > the
> > > > > same
> > > > > for everyone why can't it be used as a
> system
> > > file,
> > > > > without the need to copy it?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Neil
> > > > >
> > > > >
> > > > >
> > > >
> > >
> >
>
---------------------------------------------------------------------
> > > > > To unsubscribe, e-mail:
> > > > > taglibs-user-unsubscribe@jakarta.apache.org
> > > > > For additional commands, e-mail:
> > > > > taglibs-user-help@jakarta.apache.org
> > > > >
> > > >
> > > >
> > >
> >
>
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> > >
> >
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> >
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Re: Jakarta Taglibs Installation
Posted by Neil Zanella <nz...@cs.mun.ca>.
Well, I just had a look at the instructions at:
http://jakarta.apache.org/taglibs/doc/standard-doc/standard/GettingStarted.html
and they say to copy the contents of directory:
/usr/local/jakarta-taglibs/standard-1.0.3/lib
to the WEB-INF/lib directory. That worked, but
once again, it seems wasteful. If every user
did this for their own web application directory
then there would be a lot of unnecessary duplication.
Did you say that I can avoid this by using the
<taglib> element in my web.xml (server.xml?).
Thanks,
Neil
(Now I'll also have a look at:
http://jakarta.apache.org/taglibs/binarydist.html)_
I cannot understand why these jakarta packages can't
just distribute whatever installation instructions
are necessary in the README file like just about
any other software does it.
...
On Sun, 29 Jun 2003, [gb2312] guo yingshou wrote:
> Have a look at servlet specification.
>
> --- Neil Zanella <nz...@cs.mun.ca> µÄÕýÎÄ£º>
> > On Sun, 29 Jun 2003, [gb2312] guo yingshou wrote:
> >
> > > Have you configured the taglib in your web.xml
> > using
> > > <taglib> element ?
> >
> > No I have not because:
> >
> > 1. I have not seen anything about this in the
> > documentation.
> >
> > 2. I have read that Tomcat 4.1.24 has an
> > "autodetection feature"
> > which makes this unnecessary.
> >
> > In case 2 is not true, then where can I find
> > documentation on the
> > syntax of this <taglib> XML element and what
> > attributes/contents
> > should I set for this element?
> >
> > Thanks,
> >
> > Neil
> >
> > > --- Neil Zanella <nz...@cs.mun.ca> µÄÕýÎÄ£º>
> > > > Hello,
> > > >
> > > > I have installed Jakarta Tomcat 4.1.24 and
> > Jakarta
> > > > Taglibs 1.0.3,
> > > > both of which support the JSP specification. I
> > found
> > > > the README
> > > > file
> > > > /usr/local/jakarta-taglibs/standard-1.0.3/README
> > to
> > > > be
> > > > close to useless: it seems to me that copying
> > the
> > > > files
> > > > standard-doc.war and standard-examples.war to
> > the
> > > > WEB-INF/classes is almost irrelevant: what do I
> > > > do once I copy them? How do I test them?
> > > >
> > > > With a JavaServer page with the following
> > directive:
> > > >
> > > > <%@ taglib prefix="c"
> > > > uri="http://java.sun.com/jstl/core" %>
> > > >
> > > > I was getting the following error:
> > > >
> > > > uri (http://java.sun.com/jstl/core) cannot be
> > > > resolved
> > > >
> > > > and then also the error:
> > > >
> > > > org.apache.jasper.JasperException: File
> > > > "/WEB-INF/c.tld" not found
> > > >
> > > > Hence I fixed it with:
> > > >
> > > > $ cp
> > > >
> > /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld
> > > > \
> > > > ~/public_html/WEB-INF
> > > >
> > > > This is undocumented though. Is it what I'm
> > supposed
> > > > to do?
> > > > Seems strange to me that I would have to copy
> > the
> > > > file to
> > > > my web applications' WEB-INF directory: if it's
> > the
> > > > same
> > > > for everyone why can't it be used as a system
> > file,
> > > > without the need to copy it?
> > > >
> > > > Thanks,
> > > >
> > > > Neil
> > > >
> > > >
> > > >
> > >
> >
> ---------------------------------------------------------------------
> > > > To unsubscribe, e-mail:
> > > > taglibs-user-unsubscribe@jakarta.apache.org
> > > > For additional commands, e-mail:
> > > > taglibs-user-help@jakarta.apache.org
> > > >
> > >
> > >
> >
> _________________________________________________________
> > > Do You Yahoo!?
> > > ÍøÁµµÄÚ¹ÊÍ£ºÕæÇ黹ÊÇ·Å×Ý£¿
> > >
> >
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> > >
> > >
> >
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> > >
> >
> >
> >
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Re: Jakarta Taglibs Installation
Posted by guo yingshou <gu...@yahoo.com.cn>.
Have a look at servlet specification.
--- Neil Zanella <nz...@cs.mun.ca> 的正文：>
> On Sun, 29 Jun 2003, [gb2312] guo yingshou wrote:
>
> > Have you configured the taglib in your web.xml
> using
> > <taglib> element ?
>
> No I have not because:
>
> 1. I have not seen anything about this in the
> documentation.
>
> 2. I have read that Tomcat 4.1.24 has an
> "autodetection feature"
> which makes this unnecessary.
>
> In case 2 is not true, then where can I find
> documentation on the
> syntax of this <taglib> XML element and what
> attributes/contents
> should I set for this element?
>
> Thanks,
>
> Neil
>
> > --- Neil Zanella <nz...@cs.mun.ca> 的正文：>
> > > Hello,
> > >
> > > I have installed Jakarta Tomcat 4.1.24 and
> Jakarta
> > > Taglibs 1.0.3,
> > > both of which support the JSP specification. I
> found
> > > the README
> > > file
> > > /usr/local/jakarta-taglibs/standard-1.0.3/README
> to
> > > be
> > > close to useless: it seems to me that copying
> the
> > > files
> > > standard-doc.war and standard-examples.war to
> the
> > > WEB-INF/classes is almost irrelevant: what do I
> > > do once I copy them? How do I test them?
> > >
> > > With a JavaServer page with the following
> directive:
> > >
> > > <%@ taglib prefix="c"
> > > uri="http://java.sun.com/jstl/core" %>
> > >
> > > I was getting the following error:
> > >
> > > uri (http://java.sun.com/jstl/core) cannot be
> > > resolved
> > >
> > > and then also the error:
> > >
> > > org.apache.jasper.JasperException: File
> > > "/WEB-INF/c.tld" not found
> > >
> > > Hence I fixed it with:
> > >
> > > $ cp
> > >
> /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld
> > > \
> > > ~/public_html/WEB-INF
> > >
> > > This is undocumented though. Is it what I'm
> supposed
> > > to do?
> > > Seems strange to me that I would have to copy
> the
> > > file to
> > > my web applications' WEB-INF directory: if it's
> the
> > > same
> > > for everyone why can't it be used as a system
> file,
> > > without the need to copy it?
> > >
> > > Thanks,
> > >
> > > Neil
> > >
> > >
> > >
> >
>
---------------------------------------------------------------------
> > > To unsubscribe, e-mail:
> > > taglibs-user-unsubscribe@jakarta.apache.org
> > > For additional commands, e-mail:
> > > taglibs-user-help@jakarta.apache.org
> > >
> >
> >
>
_________________________________________________________
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> > 网恋的诠释：真情还是放纵？
> >
>
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> >
> >
>
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> >
>
>
>
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Re: Jakarta Taglibs Installation
Posted by Neil Zanella <nz...@cs.mun.ca>.
On Sun, 29 Jun 2003, [gb2312] guo yingshou wrote:
> Have you configured the taglib in your web.xml using
> <taglib> element ?
No I have not because:
1. I have not seen anything about this in the documentation.
2. I have read that Tomcat 4.1.24 has an "autodetection feature"
which makes this unnecessary.
In case 2 is not true, then where can I find documentation on the
syntax of this <taglib> XML element and what attributes/contents
should I set for this element?
Thanks,
Neil
> --- Neil Zanella <nz...@cs.mun.ca> µÄÕýÎÄ£º>
> > Hello,
> >
> > I have installed Jakarta Tomcat 4.1.24 and Jakarta
> > Taglibs 1.0.3,
> > both of which support the JSP specification. I found
> > the README
> > file
> > /usr/local/jakarta-taglibs/standard-1.0.3/README to
> > be
> > close to useless: it seems to me that copying the
> > files
> > standard-doc.war and standard-examples.war to the
> > WEB-INF/classes is almost irrelevant: what do I
> > do once I copy them? How do I test them?
> >
> > With a JavaServer page with the following directive:
> >
> > <%@ taglib prefix="c"
> > uri="http://java.sun.com/jstl/core" %>
> >
> > I was getting the following error:
> >
> > uri (http://java.sun.com/jstl/core) cannot be
> > resolved
> >
> > and then also the error:
> >
> > org.apache.jasper.JasperException: File
> > "/WEB-INF/c.tld" not found
> >
> > Hence I fixed it with:
> >
> > $ cp
> > /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld
> > \
> > ~/public_html/WEB-INF
> >
> > This is undocumented though. Is it what I'm supposed
> > to do?
> > Seems strange to me that I would have to copy the
> > file to
> > my web applications' WEB-INF directory: if it's the
> > same
> > for everyone why can't it be used as a system file,
> > without the need to copy it?
> >
> > Thanks,
> >
> > Neil
> >
> >
> >
> ---------------------------------------------------------------------
> > To unsubscribe, e-mail:
> > taglibs-user-unsubscribe@jakarta.apache.org
> > For additional commands, e-mail:
> > taglibs-user-help@jakarta.apache.org
> >
>
> _________________________________________________________
> Do You Yahoo!?
> ÍøÁµµÄÚ¹ÊÍ£ºÕæÇ黹ÊÇ·Å×Ý£¿
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>
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Re: Jakarta Taglibs Installation
Posted by guo yingshou <gu...@yahoo.com.cn>.
Have you configured the taglib in your web.xml using
<taglib> element ?
--- Neil Zanella <nz...@cs.mun.ca> 的正文：>
> Hello,
>
> I have installed Jakarta Tomcat 4.1.24 and Jakarta
> Taglibs 1.0.3,
> both of which support the JSP specification. I found
> the README
> file
> /usr/local/jakarta-taglibs/standard-1.0.3/README to
> be
> close to useless: it seems to me that copying the
> files
> standard-doc.war and standard-examples.war to the
> WEB-INF/classes is almost irrelevant: what do I
> do once I copy them? How do I test them?
>
> With a JavaServer page with the following directive:
>
> <%@ taglib prefix="c"
> uri="http://java.sun.com/jstl/core" %>
>
> I was getting the following error:
>
> uri (http://java.sun.com/jstl/core) cannot be
> resolved
>
> and then also the error:
>
> org.apache.jasper.JasperException: File
> "/WEB-INF/c.tld" not found
>
> Hence I fixed it with:
>
> $ cp
> /usr/local/jakarta-taglibs/standard-1.0.3/tld/c.tld
> \
> ~/public_html/WEB-INF
>
> This is undocumented though. Is it what I'm supposed
> to do?
> Seems strange to me that I would have to copy the
> file to
> my web applications' WEB-INF directory: if it's the
> same
> for everyone why can't it be used as a system file,
> without the need to copy it?
>
> Thanks,
>
> Neil
>
>
>
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> For additional commands, e-mail:
> taglibs-user-help@jakarta.apache.org
>
_________________________________________________________
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