primary document; primary source
Technical term used in computing and information science for original documents or raw data, as opposed to secondary or tertiary sources.
In research, it is important to consult primary documents.
This database contains many primary sources.
二次文献 refers to secondary sources that analyze or interpret primary documents, while 一次文献 is the original material itself.
一次資料 is a broader term for primary materials in any field, whereas 一次文献 is more specific to documents and computing contexts.
Compound of 一次 (primary, first-order) and 文献 (literature, documents). The term is a modern technical coinage, likely influenced by English 'primary document' or 'primary source'.