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  2. Base64 - Wikipedia

    en.wikipedia.org/wiki/Base64

    Because Base64 is a six-bit encoding, and because the decoded values are divided into 8-bit octets, every four characters of Base64-encoded text (4 sextets = 4 × 6 = 24 bits) represents three octets of unencoded text or data (3 octets = 3 × 8 = 24 bits). This means that when the length of the unencoded input is not a multiple of three, the ...

  3. QOI (image format) - Wikipedia

    en.wikipedia.org/wiki/QOI_(image_format)

    The decoder and encoder start with {r: 0, g: 0, b: 0, a: 255} as the previous pixel value. An image is complete when all pixels specified by width * height have been covered. Pixels are encoded as: Run-length encoding of the previous pixel (QOI_OP_RUN) an index into the array of previously seen pixels (QOI_OP_INDEX)

  4. Binary-to-text encoding - Wikipedia

    en.wikipedia.org/wiki/Binary-to-text_encoding

    Some older and today uncommon formats include BOO, BTOA, and USR encoding. Most of these encodings generate text containing only a subset of all ASCII printable characters: for example, the base64 encoding generates text that only contains upper case and lower case letters, (A–Z, a–z), numerals (0–9), and the "+", "/", and "=" symbols.

  5. Property list - Wikipedia

    en.wikipedia.org/wiki/Property_list

    The array, set and dictionary binary types are made up of pointers - the objref and keyref entries - that index into an object table in the file. This means that binary plists can capture the fact that - for example - a separate array and dictionary serialized into a file both have the same data element stored in them.

  6. Comparison of data-serialization formats - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_data...

    UTF-8-encoded, preceded by varint-encoded integer length of string in bytes Repeated value with the same tag or, for varint-encoded integers only, values packed contiguously and prefixed by tag and total byte length — Smile \x21

  7. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Image encoded in the JPEG XL format [89] FF 0A: ÿ␊ 00 01 00 00 00 ␀␁␀␀␀ 0 ttf tte dfont TrueType font 4F 54 54 4F: OTTO: 0 otf OpenType font [90] 23 25 4D 6F 64 75 6C 65 #%Module: 0 Modulefile for Environment Modules [91] 4D 53 57 49 4D 00 00 00 D0 00 00 00 00: MSWIM␀␀␀Ð␀␀␀␀ 0 wim swm esd Windows Imaging Format file ...

  8. Serialization - Wikipedia

    en.wikipedia.org/wiki/Serialization

    Flow diagram. In computing, serialization (or serialisation, also referred to as pickling in Python) is the process of translating a data structure or object state into a format that can be stored (e.g. files in secondary storage devices, data buffers in primary storage devices) or transmitted (e.g. data streams over computer networks) and reconstructed later (possibly in a different computer ...

  9. CBOR - Wikipedia

    en.wikipedia.org/wiki/CBOR

    RFC 8746 defines tags 64–87 to encode homogeneous arrays of fixed-size integer or floating-point values as byte strings. The tag 55799 is allocated to mean "CBOR data follows". This is a semantic no-op , but allows the corresponding tag bytes d9 d9 f7 to be prepended to a CBOR file without affecting its meaning.