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[SPEC] Backwards-compatible metadata in Gemini

Stephane Bortzmeyer stephane at sources.org

Tue Feb 23 08:05:46 GMT 2021

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On Mon, Feb 22, 2021 at 11:00:29PM +0100, text at sdfeu.org <text at sdfeu.org> wrote a message of 40 lines which said:

https://schema.org/ comes to mind:

The good point is that it already exists so we don't reinvent thewheel. The not-so-good one is that schema.org is oftencomplicated. For instance, dates are expressed in the ISO 8601 formatwhich is 1) not publically available 2) very complicated (unlike whatmost people think).

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gemini://gemini.bortzmeyer.org/rfc-mirror/rfc3339.txt RFC 3339 is a more reasonable subset of ISO 8601
as per gemini://gemini.circumlunar.space/docs/gemtext.gmi that states:

[Warning: the authoritative source is <gemini://gemini.circumlunar.space/docs/specification.gmi>]

Anything which comes after the ``` characters of a line which toggles
preformatted line *on* (i.e. the first, third, fifth, etc. toggling lines
in a document) may be treated as "alt text" for the preformatted
content.

Using this "alt text" feature is tempting, and it allows the metadataproposal to avoid any change in the specification. But, currently, asfar as I know, there is no registry of possible alt texts. (I don'task for an official registry in the spec. Any widely recognizedregistry will do.)

```purl.org/dc/terms/
created: 2021-02-22

For dates, purl is even worse, allowing many format of dates, besidesthe complicated ISO 8601. Laxity is bad for simplicity.