- From: Philip Jägenstedt <philipj@opera.com>
- Date: Mon, 24 Oct 2011 11:26:47 +0200
- To: public-html-data-tf@w3.org
- Cc: "Gregg Kellogg" <gregg@kellogg-assoc.com>
On Sat, 22 Oct 2011 23:04:28 +0200, Jayson Lorenzen <Jayson.Lorenzen@businesswire.com> wrote: > Sorry to go on and on about this but I just thought (while driving, > dangerous) that this situation is an interesting example of of a > Vocabulary specific parser behaving differently than a generic parser > (that does not know about the Vocabulary). Here is what I mean. Using a > generic parser (like Mr. Kellog's) Both of the following examples are invalid microdata and they don't represent the same things. Details inline. > <div itemscope="itemscope" itemtype="http://schema.org/Organization" > itemid="http://example.com"> > <meta itemprop="name" content="Example"/> > </div> > > <a itemprop="myCompany" href="http://example.com"> Validator.nu [1] will complain about the <a> element that "The itemprop attribute was specified, but the element is not a property of any item." The problem is that the <a> element is not a child of the <div>, so it's just ignored. Live Microdata [2] gives this JSON output: { "items":[ { "type":"http://schema.org/Organization", "id":"http://example.com/", "properties":{ "name":[ "Example" ] } } ] } (Note that there is no myCompany property.) > <div itemprop="myCompany" itemscope="itemscope" > itemtype="http://schema.org/Organization" > itemid="http://example.com"> > <meta itemprop="name" content="Example"/> > </div> Validator.nu will complain that "The itemprop attribute was specified, but the element is not a property of any item." The issue here is that there is no top-level item, since the outer item has an itemprop attribute. Consequently, Live Microdata gives no output, simply noting that "No top-level items found." > Produce the exact same RDF in a generic parser, but completely different > results in the Google Rich Snippets Test tool. It sounds like there are bugs in the microdata parser used. Gregg, can you take a look at this? [1] http://validator.nu/ [2] http://foolip.org/microdatajs/live/ [3] http://www.whatwg.org/specs/web-apps/current-work/multipage/microdata.html#top-level-microdata-items -- Philip Jägenstedt Core Developer Opera Software
Received on Monday, 24 October 2011 09:27:16 UTC