Limit Fields

The limit fields listed below are specially indexed fields that enable you to limit your searches to records of a particular characteristic, such as type of publication or language of text.

EMBASE Accession Number (AN)

CODEN (CO)

Country of Publication (CP)

International Standard Book Number (ISBN)

International Standard Serial Number (ISSN)

Language of Article (LA)

Language(s) of Summary (LS)

Publication Type (PT)

Publication Year (PY)

Number of References (RF)

EMTAGS Code (TG)

Update (UD)

You can search these fields with in or =. For example, to retrieve documents originally published in French, type:

  french in la or la=french

In addition to in and =, the following operators may be used with the Publication Year (PY) field:

< less than,

such as py<1990

> greater than,

such as py>1991

<= less than or equal to,

such as py<=1989

>= greater than or equal to,

such as py>=1992

- within a range,

such as py=1990-1992