Searching the Topic Field
Enter Topic terms to search the following fields within a record.
Enter your search terms in any order. The product returns every record containing all your search terms. To look for an exact phrase, use quotation marks. Example: "global warming"
Implicit AND Operator
Remember that the product uses an implicit AND operator when you enter two or more adjacent terms in most fields. For example:
Entering rainbow trout fish farm in a Topic or Title search is equivalent to entering rainbow AND trout AND fish AND farm. Both queries return the same number of results.
Right- and Left-hand Truncation
Both right- and left-hand truncation are allowed when using wildcards (* $ ?) in Topic and Title searches.
You must enter at least three characters after a wildcard when using left-hand truncation and three characters before a wildcard when using right-hand truncation. For example:
Lemmatization Search Rules
The product automatically applies lemmatization rules in Topic and Title search queries. Lemmatization only applies to English-language search terms. For example:
Lemmatization and Quotation Marks
The product does not retrieve synonyms and lemmatized terms when you enclosed your search terms in quotation (" ") marks. For example:
Lemmatization and Wildcards
The product turns off lemmatization when search terms are used with wildcards. For example, color* finds records that contain the words color, colors, and colorful but not colour, colours, and colourful.
To find all variants of a term, enter both terms using a wildcard separated by the OR operator. For example, color* OR colour* finds both variants.
Reminder: Lemmatization only applies to English-language search terms.
Lemmatization and Left-hand Truncation
The product turns off lemmatization when left-hand truncation is used in some types of queries. For example, *valves returns bivalves but not the singular form bivalve.
By adding right-hand truncation to your search, the product returns both plural and singular terms. For example, *valve* returns bivalve and bivalves.
Lemmatization and Too Many Search Terms
The product turns off lemmatization when your English-language search query exceeds the number of terms allowed in a search. When you exceed the limit, the product returns only exact matches.
Using Formulas when Searching
Do not separate alphanumeric characters when entering a formula in your search query.
For example, in a Topic or Title search, the query KxFe2-ySe2 returns multiple results including the title called "The electron pairing of KxFe2-ySe2".
You may use quotation marks in your query. For example, "KxFe2-ySe2" will return the same records as KxFe2-ySe2.
Implied AND Operator
The product uses an implicit AND operator when you enter two or more adjacent terms in most fields.
For example, the title search rainbow trout fish farm is equivalent to rainbow AND trout AND fish AND farm -- both queries return the same number of results.
Note: Implied AND does not apply to Chinese-language search queries.
Using Quotation Marks
Use quotation marks to find exact phrases and to turn off lemmatization and the product's internal synonym finder. For example:
The product automatically finds spelling variations (such as U.S. and U.K. spelling differences) in Topic and Title search terms.
For example, if you enter color in the Title field, the product finds all records that contain the term color and/or colour in the article title.
To turn off the this feature, enter a term using quotation marks ( "" ). For example:
Click the link for a list of synonyms.