Science Citation Index Expanded (via Web of Science)

Latest screenshot: 2024-07-12

Access to search interface:

paywalled

Last major interface update:

2021-07-08

Owner of search system:

Clarivate

Location of system headquarters:

London, UK

Year of launch:

1997

Type:

Aggregators' database

URL:

http://apps.webofknowledge.com/WOS_GeneralSearch_input.do?product=WOS&search_mode=GeneralSearch&SID=D1Aig6kVWoQL6WLywOc&preferencesSaved=

Help URL:

http://images.webofknowledge.com/WOKRS532FR6/help/WOS/hp_search.html

X-Handle:

@ClarivateAG

Description of database (by system owner)

Created as SCI in 1964, Science Citation Index Expanded™ now indexes over 9,200 of the world’s most impactful journals across 178 scientific disciplines. More than 53 million records and 1.18 billion cited references date back from 1900 to present. (COVERAGE: 1900-present)

Description of search system (by system owner)

The Web of Science™ is the world’s most trusted publisher-independent global citation database. Guided by the legacy of Dr Eugene Garfield, inventor of the world’s first citation index, the Web of Science is the most powerful research engine, delivering your library with best-in-class publication and citation data for confident discovery, access and assessment. Our multidisciplinary platform connects regional, specialty, data and patent indexes to the Web of Science Core Collection™.

Total coverage:

59.52M

Year-over-year growth (2019-2020):

4.48%

Subject coverage:

Multidisciplinary

Retrospective coverage:

1900–2021

Record types:

Open Access records:

13.25M / 22.26%

Search functionality and interface

Systematic keyword searching:

extensive

Backward citation searching:

extensive

Forward citation searching:

extensive

Query builder:

Search history:

Match preview:

Sorting options:

Query

Latency with short query:

1 seconds

Latency with long query:

1.7 seconds

Controlled vocabulary:

Field codes:

Full text search:

Search string length (narrow):

9000 terms max.

Search string length (wide):

50 terms max.

Language support: Chinese:

Language support: Cyrillic:

Truncation:

Wildcards:

Keyword position irrelevant:

Longer strings, fewer hits:

Automatic query expansion (stemming):

Verbatim queries:

Reproducible queries (time):

Reproducible queries (locations):

Operators

Search operators:

Boolean 'OR':

Boolean 'AND':

Boolean 'NOT':

Proximity operator:

Boolean works exact:

Nested search (parentheses):

Citation search / filtering

Record type filters:

Results filters:

Suggested related records:

Supported by bibliometric tools:

Bibliometrix; CiteSpace; VOSviewer

Backward citation information:

Backward citation score:

93.90%

Forward citation information:

Forward citation score:

62.83%

Retrieval

Number of accessible records:

10000

Bulk select records:

Bulk export records:

5000

Export formats:

API:

upon request

Bulk select records' backward citations:

Bulk export backward citations:

1000

Bulk select records' forward citations:

Bulk export forward citations:

1000

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