Search terms consist of one or more words. If the words are not combined with a Boolean operator (see below), search terms will be linked by AND by default.
Example: traffic flow
This search query will show all data sets containing the terms "traffic" and "flow" (also synonyms).
Search phrases are enclosed with quotation marks.
Example: "traffic flow"
This search query will only show data sets containing the precise words in that order "traffic flow".
You can use the Boolean operators AND, OR and NOT (in capital letters) in your search query. If you want to use several operators, you will have to use brackets to logically seperate each search term.
Example: (mobility OR transport) AND research AND NOT e-mobility
This search query will show all data sets containing either "mobility" or "transport" and always containing "research" but never containing "e-mobility".
You can modify your search terms with wildcard characters such as asterisks (*) and questionmarks (?). A questionmark is used as a placeholder for one letter. An asterisks can be interpreted as a number of literal characters or an empty string. Wildcard characters can be combined and used several times in a search term. However, they cannot be used in search phrases.
This search query will show data sets containing words such as "cut" or "cat" and more.
This search query will show data sets containing words starting with "laser" or including "laser".
In the advanced search, the four indices search term, author, title and numbers can be searched individually or in combination. Search phrases, Boolean operators and wildcards are used in the same way as in the Basic Search. The index fields of the Advanced Search are linked with AND.