Licensing question

[Rafael Sousa (Ext_Altior)]

Hi all!
 
I'm using Xerces-C++ on my project. I have the libxerces-c.so.27.0 file
under some directory in a commercial system, and my software uses it. No
changes were made to Apaches' source code.
 
My question is: What does the Apache License Version 2.0 obliges? Is it
just to distribute the LICENCE file along with the .so file? Does it
suffice to have it in the same directory as the .so file?
 
Thanks in advance,
 
Rafael Sousa