Emily King is the Digital Services Librarian at the College of Southern Nevada. She created diagrams to analyze the system for requesting books and articles not available in the CSN library catalog. The diagrams include an activity diagram showing the steps a patron takes and swim lanes showing the roles of the library catalog, interlibrary loan system, and patron. The process begins with a patron searching the CSN library catalog. If no result is found, the patron can then search the entire interlibrary loan system to request the book or article.