Tip #49 Command Line Syntax and Quotations in Embase on Ovid
The Crux: when including the terms use, root, scope, or ptx (a protein) in a search query, you may need to apply quotation marks either around the term or around the phrase in which it appears. Many databases ignore or remove frequently occurring terms from search queries to expedite processing time. So called stopwords in Embase are and, as, for, from, is, of, that, the, this, to, was, and were . The stopword and is also a Boolean operator. If you use and in an advanced search, it will not be ignored but will act as an operator unless you enclose it in quotation marks, which will render it a stopword. Either way, your search should not result in a database error or baffling results. A notable exception in Embase (Ovid) are controlled vocabularies. A search for aerosolized particles and droplets/ [forward slash signifies a subject heading], will return zero results. However, if you enclose it in quotation marks, "aerosolized particles and droplets"/ , you'll correctly