January 2008

• Added notes stating that the CyberSource servers do not support persistent HTTP connections. For name-value pairs, see Requesting ICS Services. For XML, see Requesting ICS Services.

October 2006

• Added information regarding PCI and PABP compliance. See the description of enableLog in Table 1.

July 2006

• Added important information about configuring your client API host to a unique, public IP address. See System Requirements.

• Updated the information about the supported versions of PHP. The Linux version of the client now also includes support for PHP 5.1.0-5.1.2. See System Requirements.

• Updated the guide to reflect the new folder structure for the client’s samples directory.

• Modified Appendix A, Generating Security Keys. The process for generating a key is now identical in both Business Centers.

March 2006

• Updated the information in Other Necessary Documentation.

• Updated the information in Going Live.

August 2005

• Added guidelines for using the client’s logging capability. See the description of the enableLog property in Configuration Settings.

• Added information about the type of character set encoding that the SDK supports. See System Requirements.

July 2005

• Removed the information about using namespace prefixes in XML requests.