Cui's Biography of Northern History: "At that time, Emperor Wu Yin was destroyed, and the Chinese side offered twenty strategies to make the emperor great. Zhao Fen deleted the format with a young maid. "
Tang Lirong's "Monologue" volume: "Since the Emperor Gaozu entered the customs, the generals have gathered jade and accumulated goods, but Xiao He alone accepted the Qin-style laws and regulations, and his death was the first in the Han Dynasty."
"History of the New Five Dynasties: The Story of Liang Taizu": "In December, the format of issuing laws and regulations."
Stone's "New Book": "This dynasty takes the law as the classics, and the decree format is established at any time."
"The Biography of Northern History and Han Qilin": "The gift of good or ill luck is prepared as a format; Make the difference between the noble and the humble, and people return to simplicity. "
Song "Qingbo Magazine" Volume 6: "Yuan Feng four years, in the above table, said in? Dafuquan knows grammar, King Khan, books and world officials, landlords and Han families, etc., so these languages dare not have their own formats. "
Zhao Qingyi's "Seven-character method of Oubei poetry talk": "It is conducive to the Song people to emphasize the sound disease when they are immersed, so the five-seven law has become a certain format."
The second chapter of Hong Shen's film and drama performance: "There are at least the above three formats for emotional venting."
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Storage form
Popular Science China | This entry is reviewed by the entry writing and application project of Popular Science China.
File format (or file type) refers to the special coding method used by computers to store information, which is used to identify the information stored internally. For example, some store pictures, some store programs, and some store text information. Each kind of information can be stored in computer memory in one or more file formats. Each file format usually has one or more extensions that can be used to identify it, but it may not have an extension. A file format whose extension can help an application recognize it.
There are only two kinds of valid information for hard disk or any computer storage: 0 and 1. Therefore, computers must design corresponding ways to convert information into bits. Different information has different storage formats.
Chinese name
Storage form
Foreign name
file layout
Another name
List file types
application area
computer
quick
navigate by water/air
Type specification extension function signature metadata type code magic number file attribute extension type format
function
Some file formats are designed to store special data. For example, JPEG file format in image files is only used to store static images, while GIF can store both static images and simple animations. Quicktime format can store many different media types. Text files include: txt files generally only store simple ASCII or Unicode text, and there is no format; HTML files can store formatted text; PDF format can store rich illustrated text.
The same file format, processed by different programs may produce completely different results. For example, if you read a Word file with Microsoft Word, you can see the contents of the text, but if you play it in an unformatted way with a music playing software, it will produce noise. A file format will produce meaningful results for some software, while for others, it is like useless digital garbage.
type
From the program point of view, files are data streams, and the file system provides access methods for each file format. For example: metadata. Different operating systems habitually adopt their own ways to solve this problem, and each way has its own advantages and disadvantages.
Of course, modern operating systems and applications usually need the methods described here to handle different files.
standard
Many file formats are open, standardized or suggested to varying degrees. These specifications or recommendations describe how data is encoded and arranged. Sometimes it is specified whether a specific computer program is needed to read or process it. In both cases, the file format is not public. The first case is that the developer regards the file format as a trade secret and is unwilling to disclose it; The second situation is that developers are unwilling or spend little time on standardizing documents.
It should be noted that the use of unpublished file formats may bring additional costs. To understand this file format, you need to reverse engineer or pay the developer to get the file format. In the second way, it is often necessary to sign a non-proliferation agreement with developers. In any case, both methods are time-consuming and expensive.