In addition to the basic functions of access to the
library catalog, and a user's subscription records, significant elements of a library portal normally include: • "
Metasearching tools, browsable interfaces, and online reference help", which aid in the discovery process • Links to full-text articles,
OpenURL, •
Interlibrary loan (ILL) or document delivery, for material the library does not own •
Citation management software, user preferences services, "
knowledge management tools" More recently, the focus has been on the discovery goal, which has led to even more difficulties in defining a library portal. The terms "
discovery tools", "discovery services", "next-generation discovery tool", and "next-generation
OPAC" are often used interchangeably. ==Current market==