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Query Syntax

21/01/2015 466 views 0 likes
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A simple query may involve searching for documents that contain a particular word or phrase or searching for a date.
For example, to search for documents that contain the word “Envisat”, enter “Envisat” in the “Search for” text box.

EMITS also supports a range of query syntax options that enable you to conduct more sophisticated searches.

 Syntax Element  Description Example
 * (Truncation stem)  Use an asterisk * to truncate a word Enter comput* to find computer, computers, computation, computing etc.
 ! (Single character masking)  Use exclamation mark ! to mask a single character Enter "wom!n" to find both woman and women.
 "..."(Phrase)  To search for a phrase, enclose it in double quotes Enter "spacecraft attitude" to find exactly spacecraft attitude
 [...](Proximity)  Enclose words in square brackets to find them within 40 characters of each other in any order. Enter [using attitude] to find Spacecraft Attitude Determination Using GPS
 Meta-hyphen  Hyphens are always converted into meta-hyphens Enter "micro-computer" to find micro-computer, microcomputer or micro computer
 AND  Separate words by spaces to retrieve records that contain  all of them, in any order and position. (AND is the default operator between words, so you don't need to type it.) Enter "spacecraft determination" to find documents that contain both the words spacecraft and determination in any position.
 OR Enter words separated by OR to search for documents that contain either word. Enter "budget or finance" to search for documents that contain either of the words budget or finance.
 NOT Enter words separated by NOT to search for documents that contain the first word but not the second word. Enter "budget not finance" to search for documents that contain the word budget but not finance.

Table 3 – Query Syntax

 

You can combine syntax elements to create complex queries.
For example, enter "attitu* control" OR [control steering] to search for documents that contain either the string attitu (including attitude, attitudinal and so on) or both of the words control and steering.

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