specifies which guest server the host server should query for particular host content for scalability performance security or other reasons one or more guest server might be mirrored such that several guest servers hold mirror images of the same data the selection among one of several guest servers might be done using well known selection techniques such as a round robin technique of course what is returned might include links rather than containing the actual content for example the host server might return a page that contains links to specific guest content instead of sending the guest content as part of the page if that is the case the role of the guest server might not include sending the guest content but merely determining from context what guest content to send and sending a specific reference such as a url to that content fig2 illustrates aspects of host content management in greater detail as illustrated there a host server makes a fetch request for host content 200 from host content database 202 host content might also be construed as including a host content summary database 204 a host content taxonomy 206 and a host content dictionary 208 host content might be stored in relational database structures hierarchical structures directory name structures file systems or the like such that it is retrievable on request but no specific structure or database format is required thus the host content might be stored as records in a relational database but might be stored in a database file association wherein some of the information about the host content is in.