#microformats 2026-06-03

2026-06-03 UTC
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[tantek] [snarfed] or was it aaronpk, on the suggestion to use "multivalued", in context that makes it seem like every property MUST be multivalued which also isn't accurate. I think multivalue-capable expresses the possibility clearer than before and more as a MAY.
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[snarfed] yeah there are two different points here. every mf2 value *is* a list, but not every mf2 value has more than one value inside that list
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[snarfed] the first point is the one that usually surprises people
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[snarfed] we can definitely distinguish the two points, and make them both
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[KevinMarks] I think saying that each one is a list is clearer. It also encourages people to write iterator code rather than just dereferencing. The alternative is that you need to type check and null-check each property and nested property and write a lot of conditional code, the way LD forces you to.
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ZodiacalComet Is it expected of a MF2 parser to not catch an audio URL when it has the form `<audio class="u-audio"><source src="URL"></audio>`?
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[tantek] that is correct. if you put the property on an element, typically an mf2 parser will only look at the attributes (or textContent) of that element.
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jkingweb Yes.
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[tantek] if you want the 'src' from the <source> element, then you MUST put the u-audio class name directly on that element
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[tantek] see this in the parsing spec for the details: https://microformats.org/wiki/microformats2-parsing#parsing_a_u-_property
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[tantek] this line: else if `audio.u-x[src]` or `video.u-x[src]` or `source.u-x[src]` or `iframe.u-x[src]`, then get the `src` attribute
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ZodiacalComet Understood. Thanks for the info
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[tantek] There is an issue filed on the parser exploring the possibility of expanding u-* parsing on audio/video elements to dig into nested source elements here if you want to add more use-cases / interest: https://github.com/microformats/microformats2-parsing/issues/53
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