Problem with old packages

Question

I am trying to recreate the web-based data mining tool as outlined here (http://www.ibm.com/developerworks/library/wa-wbdm/) way back in 2001.
I am generating quite a few errors compiling XMLHelper (35 in all), and I've done a bit of research to try to understand these errors and how I might address them.
It appears that most of the errors are derivative to the following initial errors:
1) package org.apache.xerces.dom does not exist, import org.apache.xerces.dom
2) package org.apache.xerces.parsers does not exist, import org.apache.xerces.parsers
3) package org.apache.xml.serialize does not exist, import org.apache.xml.serialize
4) package org.apache.xalan.xslt does not exist, import org.apache.xalan.xslt
5) package org.apache.xpath does not exist, import org.apache.xpath
6) package org.w3c.tidy does not exist, import org.w3c.tidy
It also appears that a number of these packages are considerably outdated, and either no longer exist in the form shown, or the functionality being sought from the package now resides in a different package.
Any insight on how I mgiht resolve these errors would be greatly appreciated. I am not wedded to this particular approach, however, so if there is a better/more up to date approach (with tutorial, of course, as I'm quite new at this) to accomplish the same objective (automatically extract information from a particular web source and prep it for some database friendly format), even better.
The data I am seeking is very public - restaurant inspection information posted online periodically by a city agency.
Thank You,
Ottac

Answer 1

cotton.m,
Thank you for clarifying the terminology.
Actually, I have previously downloaded the current xalan and xerces-j packages from sourceforge, extracted them, and even added the parent directory of the .jar files to my classpath before attempting the compile for XMLHelper.java, but to no avail. I have done the same with tidy (added the unzipped folder to classpath), which only appears to have a .css file (not sure if that is what I need). I still get the same errors indicating the packages cannot be found. I have read in some other forum posts that some of the packages may have been significantly reconfigured, particularly post java 1.5, and may not longer be accessible in the enumerated format.
I certainly would prefer a clean data (i.e. web service) format rather than attempting to scrape from the web, but unfortunately the relevant bureaucrats are neither helpful nor responsive: "it's on the website" is all I get, no matter how I try.
I may be able to convince someone to send me a text file, csv or something, but I can already tell it won't be easy, and will probably only turn out to be a one-time quick fix in any event. The particular agency just spent a considerable amount of money getting a system up and running that would present the data in a 'user-friendly' format to the public (it's decent, in any event), so I am not particularly concerned that the page format will change in the near or medium term.
In any event, back to the errors, then. I've downloaded the xalan and xerces tar.gz files, unzipped them, identified the parent director of the relevant jar files (such as xalan.jar, serializer.jar, etc), added the path to these directories to my classpath, and still get the same errors when I javac -verbose XMLHelper.java...
Thanks Again...