Some libraries collect e-journals of professional societies. Holdings statements for e-journals vary more than their print counterparts. A wide variety of considerations exist when cataloging e-journals. A primary consideration for many is what unit to catalog. When a library owns rights to a service such as Proquest, a single record with a link to the collection is the way the majority of libraries handle it.
Some libraries have lists of journals and catalog records of all journals available on the Internet.
Other considerations include using the same record as the print version, how complete a cataloging record does one create and which staff catalogs the material. Some libraries assign the serials cataloger, the job of cataloging e-journals, others have people who catalog all electronic resources and other have subject specialists. Most libraries feel the present situation is temporary and is very likely to change. Another major consideration is who checks the status of the URLs and how often do they do it. One library only accepts electronic journals that accept ranges of IP addresses and refusing any journal requiring password access.