Classification A1 / P1: definition and distinction

Definition A1

Articles included in one of the ISI Web of Science indexes 'Science Citation Index', 'Social Science Citation Index' or 'Arts and Humanities Citation Index'. Limited to the publications document type: article, review, letter, note, proceedings paper.

When an article is already included in Web of Science, both the document type and the index are indicated on the detail page.

Definition P1

Proceedings included in one of these ISI Web of Science indexes: 'Conference Proceedings Citation Index - Science' of 'Conference Proceedings Citation Index - Social Science and Humanities'. Limited to publications document type: article, review, letter, note, proceedings paper, with exception of publications classified A1.

When an article is already included in Web of Science, both the document type and the index are indicated on the detail page.

Distinction A1 / P1

There's an overlap between the classifications A1 and P1. A1 has priority over P1. If a proceedings paper is found in the Science Citations Index as well as in the Conference Proceedings Citation Index - Science, then the former has priority and the classification is A1. However, if the proceedings paper is only found in the latter, then the paper is classified P1.

This image shows how to detect the difference:

A1-P1 onderscheid

When an article is already included in Web of Science, both the document type and the index are indicated on the detail page.

Is this article a possible A1 publication?

For science, technology and medicine (STM): look up the journal in the Journal Citation Reports:

  • Look up the journal title in the search bar. Make sure to type slowly, so the website can keep up.

  • If the journal appears in this list, articles are possibly A1, depending on the criteria described above. If it does not appear in this list, articles are surely not A1.

For all discipines: look up the journal in the Web of Science journal list.

Go to web of science and chose "Publication name" in the search box. Chose "select from index"

Look up the title. If you can't find it, the journal is not indexed in Web of Science. If it is, click the button "add" and "Transfer your selected title(s) below to the Publication Name field on the search page." to include the title in your search. Don't forget to restrict your search to the A1 indexes.

Click search and look in the results if you find recent publications. If there are only old articles, e.g. more then 3 years old, the journal is probably not included in Web of Science anymore.

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Last modified Sept. 2, 2021, 5:04 p.m.