Comment by panzi

1 day ago

And then there is https://schema.org/ It's the item* attributes, e.g.: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/... Also Dublin Core in <meta> tags. Why do they keep adding conflicting meta data formats to HTML!?!

6 comments

panzi

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alwillis  1 day ago

They don't conflict; they were designed to work together. You can have schema.org (in JSON-LD, RDFa, or micro data) on the same page as Dublin Core, etc.

For example, there's no explicit property in schema's Person type [1] for a nickname. But the FOAF standard does [2].

Just add FOAF to the JSON-LD context:

    {
      "@context": {
        "@vocab": "https://schema.org/",
        "foaf": "http://xmlns.com/foaf/0.1/",
        "pronouns": "https://schema.org/pronouns" 
    }

You now use the FOAF nickname property:

    "@type": "Person",
      "givenName": "Timothy",
      "familyName": "Berners-Lee",
      "foaf:nick": "TBL",

You can do the same thing with Dublin Core, DBPedia, etc.

[1]: https://schema.org/Person

[2]: https://xmlns.com/foaf/spec/#term_nick

klodolph  1 day ago

I think if you are using Dublin Core, it’s because you’re a library. Maybe I am off the mark, but that is the sense I get from this—not all these standards should be used for all pages on the web.

I think you should just think about what metadata you actually care about, and the main metadata I care about (choose your own list) is authorship, publish date, last update, subject keywords, thumbnail (OpenGraph 1200x630), and summary.

There’s a long list of additional metadata that I could put in my webpages because there are standardized ways to do it, but, why bother?

  • rhdunn  5 hours ago

    Dublin Core is effectively similar/related to schema.org's CreativeWork. If you have a creative work (audiobook, short story, news article, etc.) then Dublin Core is applicable, in addition to the corresponding CreativeWork subtype.

    And yes, you should use whatever metadata is applicable to your site and test it against the search engines/etc. you want to support to make sure that they are reading the metadata correctly.

jauco  1 day ago

To be fair schema.org and dublin core say “when a property is name ‘title’ it means …” and you can expect to find the following properties…

Json-ld says: if you want to know whether the “title” property means the schema.org or the dublin core variant then you can find out which it is by <json-ld algorithm>

So you’d always use json-ld _with_ schema.org or something.