The retrieval field is only the level of document retrieval, such as library book retrieval, which can be retrieved separately or in combination by title, author and publishing house. Search terms are similar to keywords in search engines.

For example, in library book retrieval, only the author is regarded as the only retrieval field, and the input author name is the retrieval word.

When searching for documents in China HowNet, did you find a drop-down box on the left side of the search box, where you can choose words such as "subject" and "full text"? What's the difference between these words and retrieval?

"Subject", "full text" and "article title" are called search fields, which can be simply understood as the areas where the search words entered by readers appear. In CNKI platform, different literature types have different retrieval fields, and the common retrieval fields are: subject, title, abstract, author, unit, keyword, source literature (journal name, etc. ).

It should be noted that "subject" is a combined search field, and selecting "subject" means searching for qualified documents in "title+keyword+abstract".

When you select different search fields, different search results will appear. For example, selecting "Company Search" will retrieve posts related to the company represented by the search term. Therefore, different retrieval fields can be selected according to the retrieval needs to improve the retrieval accuracy.