Writing a thesis is a very common thing for college students, and they will also check the references in their own papers. Have you noticed that all references have corresponding doi numbers, so what is doi? What is it made of?

What's the doi number of the document?

Doi refers to digital object identifier, which is the best big data sample storage and application technology under the background of cloud computing, and is used for unified distribution of IKE negotiation SA protocol.

Composition form 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.