DOI (number? Object? Unique? Identifier) is a digital object identifier, which is equivalent to the address of the paper, and can be directly queried and downloaded according to the DOI of the paper.

Inquiring about DOI needs to be done on a networked computer.

1. China literature

China literature can be found in many databases, such as China HowNet, Wanfang Database and VIP. Now take China HowNet as an example to explain how to query DOI.

First, enter the title of the document.

Next, click on the paper interface to check the DOI number of the document.

Other databases can do the same.

2. Foreign languages and literature

For foreign language documents, you can also query and copy them on crossref website and enter the title in the search box.

Extended data:

Composition analysis of DOI;

1. coding scheme

The coding scheme of DOI (American standard ANSI/NISO Z39.84-2000) stipulates that a DOI consists of two parts: prefix and suffix, separated by "/". There is no limit to the character length of prefixes and suffixes.

2. Prefix combination

DOI prefix consists of two parts, directory code and registration agency code. Any organization or unit that wants to register DOI can apply for registration agency code from IDF.

3. Suffix formation

DOI suffix is the only suffix under a specific prefix, which is designated by the registration authority to ensure its uniqueness. The suffix can be any alphanumeric code, and its coding scheme is completely specified by the registration agency itself.

References:

Baidu encyclopedia -doi