Report:STN/Search Syntax/Allowed Operators/Other Operators

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< Report:STN | Search Syntax | Allowed Operators

Report

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System Data
Overview
Major Recent Updates
System Features
Data Coverage
- Summary
- Patent Coverage
- Non Patent Coverage
  - Available Databases
Search Interface
- Introduction
- Login and Logout
- Wizards and Assistants
- The Search Forms
- The Command Line Interface
Search Syntax
- Searchable Datafields
- Allowed Operators
  - Boolean and Proximity Operators
  - Truncation or Wildcard Operators
  - Other Operators
Viewing Results
Import, Export, and Download
Search History Interface
Usability
Company Strength
Customer Support
Security
Pricing
Sources and Notes
Revisions

<< Truncation or Wildcard Operators | Introduction >>

Numeric Operators

Some search databases in STN contain numeric information which can be searched as a single value, a range of values, or any value above or below a particular value. The user may type "HELP SNUMERIC" at any time to find out which data fields are numeric fields in the current data file.

Editor's Note:

Numeric operators may be particularly helpful when conducting searches within patent databases, since users can then search within specific number ranges for chemical or physical properties listed within relavent patent documents.

The table below lists the numeric operators in STN and guidelines for using them.^[1]^[2]

Operator	Description
/ or =	Equal to a specified value
<	Less than a specified value
>	Greater than a specified value
=< or <=	Less than or equal to a specified value
=> or >=	Greater than or equal to a specified value
n-m	In the given value range (endpoints inclusive)

Note: Numeric operators work the same in all databases on STN. However, the numeric fields available will differ from database to database.

Order of Operations in STN

The order of operations for the operators is:^[2]

Numeric operators > (W),(NOTW),(A),(NOTA) > (S),(NOTS) > (P),(NOTP) > (L),(NOTL) > AND, NOT > OR

Note: As in other search systems, parentheses can be used to alter the order of operations.

Sources

↑ "Mastering STN Commands: Operators." CAS website, http://www.cas.org/training/stncommands/operators.html. Accessed July 21, 2011.
↑ ^2.0 ^2.1 "STN Pocket Guide." CAS website, http://www.cas.org/support/stngen/doc/stnpocketg.html. Accessed July 20, 2011.

[a-1] "Mastering STN Commands: Operators." CAS website, http://www.cas.org/training/stncommands/operators.html. Accessed July 21, 2011.

[b-2] 2.0 ^2.1 "STN Pocket Guide." CAS website, http://www.cas.org/support/stngen/doc/stnpocketg.html. Accessed July 20, 2011.

[1]

[2]

Report:STN/Search Syntax/Allowed Operators/Other Operators

From Intellogist

Numeric Operators

Order of Operations in STN

Sources

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