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27 lines
1.5 KiB
Org Mode
27 lines
1.5 KiB
Org Mode
:PROPERTIES:
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:ID: ccb3bc14-a801-4ed0-b066-50b1bcd853aa
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:END:
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#+title: File metadata
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#+date: "2020-04-13 17:32:27 +08:00"
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#+date_modified: "2021-05-21 18:50:11 +08:00"
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#+language: en
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File metadata is one of the most subtle requirements in [[id:88f2256a-3359-4d10-92a3-9273cabce414][Personal information management]].
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It embeds data without relying too much on filesystem such as the file name, creation date, and modification date.
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Each type of files have different ways of embedding metadata:
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- Image files such as JPEG or PNG, metadata are embedded in Exchangeable image file format (EXIF).
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- MP3 files have the ID3 format.
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- Vorbis comments is a universal format commonly found on OGG.
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- HTML documents contain the ~<head>~ element to store the metadata.
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- [[id:c422175a-5b65-4311-8cc6-11efd55364e8][Org mode]] and Asciidoctor documents allow file-level properties that are functionally equivalent to embedded metadata.
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- Universal formats such as Extensible metadata platform (XMP) or Meta Information Encapsulation (MIE) available either as embedded or a separate file.
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Tools exist for writing and reading data such as [[https://exiftool.org/][Exiftool]].
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While file metadata are good and dandy, don't worry too much on them.
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Just start with the more important data such as the title, authors, and the date.
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It is preferred if you can edit the metadata manually so you can mark more relevant information.
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Having too much however might as well have no metadata due to information overload.
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