"The thesaurus consists of descriptors and non-descriptors" is indeed true.
Both descriptors and non-descriptors play a role in the thesaurus, with descriptors being the preferred terms and non-descriptors being alternative or related terms.
"Delivery of Book Act" being passed in 1954.
The full form of ISBD is "International Standard Bibliographic Description." The ISBD is a set of rules and guidelines developed by the International Federation of Library Associations and Institutions (IFLA) to standardize the bibliographic description of various types of resources, such as books, periodicals, audiovisual materials, and electronic resources. It provides a structured format for creating consistent and comprehensive bibliographic records, ensuring that essential information is included to facilitate resource discovery and access in library catalogs and databases.
It is true that Google's PageRank algorithm takes into account the concept of citations, it is not solely based on citation analysis. PageRank is an algorithm developed by Google's co-founders, Larry Page and Sergey Brin, as part of their research at Stanford University.
PageRank assigns a numerical value, or PageRank score, to web pages based on the quantity and quality of links pointing to them. The underlying idea is that a page with a higher number of links from other reputable pages is likely to be more important or relevant. The algorithm considers both the number of incoming links and the importance of the linking pages to determine the PageRank score.
The Library of Congress did not issue the first edition of the MARC 21 format in 1987. The MARC 21 format was developed jointly by the Library of Congress and the Canadian Library Association. The first edition of MARC 21 was published in 1999.
The International Library Association (ILA) organizing an IFLA regional seminar on UAP (Universal Availability of Publications) in New Delhi in 1985.
When planning a library building, it is indeed important to consider future needs and anticipate the requirements for at least the next 20 years.