Indeed Axel, I checked it on Maven online dependencies, but I couldn't find it. I got the Alfresco Core and other repositories, but seems that library is not included in those packages. I don't know where else to look for this library. I also checked Download alfresco-core-2.2.0.jar : alfresco « a « Jar File Download for the jar files, but again this library for tagging is not included.
I said you needed the alfresco-repository-XX.jar and you checked the alfresco-core-XX.jar of an extremely old version? Why did you not look in the Alfresco repository? Sources like java2s are unofficial and may have extremely varying degrees of quality anyway - they should not exist at all if people didn't blindly follow Google search results.