Document Types

TypeCount
Non-Document8,381,003
Abstract1,618,194
Correction265,744
Cover25,585
Book Review636,563
Unknown11,456
Other295,287
Information Materials (various articles by the journals)20,212,313
Commissioned Article9,555,377
Deleted (e.g., deleted DOIs, but not retracted)1,760,759
Announcement1,425
Highlight37,482
Retraction20,497
Non-Peer-Reviewed15,815,096
Views498,181
Opinion14,501
Editorial600,101
News548,654
Non-English Research Article4,795,850
Proceeding24,561
Book Chapter325,500
Discussion142,825
Case Report1,838,798
Research Article74,071,951
Communication1,166,590
Review317,970
Perspective27,457
Total143,009,720

Linguistic Analysis

Unique CountTotal Count
Sentencesnot counted3,639,044,291
Subjects/Objects [1]21,630,4148,988,487,612
Verbs [2]126,841983,578,672
Adverbs [3]36,795301,941,020
Adjectives [4]88,293749,792,004
[1] Only common subjects/objects (1,209,485) were used for the linguistic analysis.
[2] Only main verbs of the sentences are counted. For example, in the sentence "I was told"; there is only one verb: "to tell"; "to be" is part of the main verb's tense.
[3] Adverbs are counted when modifying the main. For example, in the sentence "We built a chemically modified electrode.", "chemically" is part of the "chemically modified electrode" object. The same apply to the verb, "to modify".
[4] Adjectives are normally part of the subjects/objects, and are used for further parsing of the corresponding components.