of these has a different set of issues. In order for copyright to be violated, several conditions must be met. First, the claimant must be able to show that they own the copyrights for the material in question. Second, all or a significant part of the source must be present in the infringing material. There must be enough similarity to show direct copying of material. SVRx code allegedly in Linux The issue of ownership of the SVRx code base was discussed above. Besides the unresolved issue of what was actually transferred from Novell to Santa Cruz Operation, there are also the portions of the SVRx code base that are covered by BSD copyrights or that are in the public domain. SCO's first public disclosure of what they claimed is infringing code was at its SCO Forum conference in August 2003 at the MGM Grand Las Vegas. The first, known as the Berkeley Packet Filter, was distributed under the BSD License and is freely usable by anyone. The second example was related to memory allocation functions, also released under the BSD License. It is no longer in the Linux code base. SCO has also claimed that code related to application programming interfaces was copied from UNIX. However, this code and the underlying standards they describe are in the public domain and are also covered by rights USL sold to The Open Group. A later claim was made to code segments related to ELF file format standards. This material was developed by the Tool Interface Standard (TIS) Committee and placed in the public domain. SCO claims that the TIS Committee had no authority to place ELF in the public domain, even though SCO's predecessor in interest was a member of the committee. SCO has claimed that some are violating UNIX SVRx copyrights by putting UNIX code into Linux. They may or may not have brought this claim directly in any of their cases. The IBM case is about derivative works, not SVRx code (see below). The Novell case is about copyright ownership. DaimlerChrysler was about contractual compliance statements. The "may or may not" comes from AutoZone's case. In AutoZone, SCO's complaint claimed damages for AutoZone's use of Linux. However, when objecting to AutoZone's request for a stay pending the IBM case, SCO apparently contradicted their written complaint, claiming that the case was entirely about AutoZone copying certain libraries (outside the Linux kernel)