Evolving information-retrieval techniques, exemplified by developments with modern Internet search engines, combine natural language, hyperlinks, and keyword searching.
Two main approaches are matching words in the query against the database index (keyword searching) and traversing the database using hypertext or hypermedia links.
"We could soon view today's keyword searching with the same nostalgia and amusement reserved for bygone technologies such as electric typewriters and vinyl records".
Most of them are plain text versions of books and are not integrated into Web-based databases, which means that they do not allow keyword searching across multiple volumes.
Worldwide museum sites can also be found in the Museum Online Resource Review, which provides keyword searching as well as lists of various kinds, and by the Guide to Museums and Cultural Resources.
You can do something more like keyword searching in smaller subject collections, but nothing like Google searching (there is no relevance ranking, for instance), because the tools for doing anything meaningful with Web archives are years behind the tools for creating those archives.
Other databases were queried by using identical terms for keyword searching.
This also uses the public key primitive to support the keyword searching on encrypted data.
In recent times, web-based search engines such as, Google, Yahoo, etc., are being used extensively to search for images based on text keyword searching.
Last but not least, Wei-Chuen Yau, Raphael Phan, Swee-Huay Heng, and Bok-Min Goi present "Security models for delegated keyword searching within encrypted contents".
The interface purports to allow users to draw chemical structures and work through the database that way, rather than simply use keyword searching.
