!DOCTYPE taglib url question

[eric he]

I have following lines in the .tld file:
<!DOCTYPE taglib
PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">

it runs in tomcat.

question 1. will "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd"> realy cause tomcat to get this file from sun.com ? what happens when sun.com is down, many jsps will not run?

question 2. if tomcat is behind a http proxy server which requires authentification, how do I make it work, setting something in tomcat?


Thanks in advance.

Eric

[Anil Kumar Saha]

Hope this may clear your doubt:---

Valid XML Output:

Including DOCTYPE Declarations
A valid XML document is one that has a document type (or "DOCTYPE") declaration and conforms to the DTD in that document type declaration. (Remember, an XML document with no DOCTYPE declaration isn't valid, but it can still be a legal XML document as long as it's well-formed. "Valid" is a technical term referring to the presence of and conformance to a DOCTYPE declaration.)

A DOCTYPE declaration can include DTD declarations as an internal DTD subset between square brackets, like this,

<!DOCTYPE chapter [
<!ELEMENT chapter (title,para+)>
<!ELEMENT title (#PCDATA)>
<!ELEMENT para (#PCDATA)>
]>
or it can point to DTD declaration stored in a separate file like this:

<!DOCTYPE chapter SYSTEM "../dtds/chapter.dtd">
The SYSTEM identifier tells the XML parser where to find the DTD file on the system. An optional PUBLIC identifier can specify another string for the parser to use when locating a DTD file. These usually use a string similar to the following, which avoids any system-specific information to make the document more portable across different systems:

<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML//EN"
"../dtds/chapter.dtd">

The XML parser should look up this PUBLIC identifier somewhere to find the exact location of the local copy of the DTD file. (There have been proposals for the format and location of the lookup table, but none has caught on enough to be a widespread standard in the XML world, so that "somewhere" has never been completely resolved. In fact, people are using PUBLIC identifiers less and less anyway.) If it can't find it, the parser uses the SYSTEM identifier following the PUBLIC identifier. In the example above, the SYSTEM identifier doesn't need the word "SYSTEM" -- because it's a required parameter, the XML parser knows what it is.

http://www.xml.com/lpt/a/2002/09/04/xslt.html

[eric he]

Thank you very much Anil Kumar, that cleared some of my cloud, my quess is that we should be able to setup tomcat with taglibs to run for local users, without internet connection. is that true?

for my second question, tomcat behind a http proxy server which need authentification, I still can't find solution after searching for hours, one said we could setup proxy host/port in conf\catalina.properties, then what about authentification?

Eric

[Bear Bibeault]

Moved to the Tomcat forum.