Hi - we are trying to upgrade with below details from Pega 7.1.9 to Pega 8.5

 on Premise to On Premise | Pega platform | App server –WebLogic   Proprietary information hidden | DB Server – Oracle server Proprietary information hidden

As per pega plaftform upgrade guide, we need to copy 3 jars xercesImpl-2.10.0.jar, xml-apis-1.4.01.jar and xalan-2.7.1.jar. We couldn't able to get the xalan-2.7.1.jar file from apche website. Please guide where exactly we need to get it .

As per doc:

xalan-2.7.1.jar —Obtain this file from the Apache Software Foundation Xalan project. For more information about the Apache Software Foundation Xalan project, see https://xalan.apache.org/.

We could find some files here but couldn't finalize what we should download and use

http://archive.apache.org/dist/xml/xalan-j/