The difference between isPartOf and hasPart in Sch

问题:

What is the difference between the Schema.org properties isPartOf and hasPart and when to use the one instead of the other?

回答1:

As noted on their pages, they are inverse properties.

As an example, let’s take a webpage that is part of a website. You could then state one of these:

• WebSite hasPart WebPage

• WebPage isPartOf WebSite

It doesn’t matter which one you choose. (But there might of course be consumers that only recognize one of these properties.)

Note: Most of the time, Schema.org doesn’t define an inverse equivalent for a property. For example, there is author, but no authorOf. This is because you can use every property for both directions, with the help of the syntax:

• RDFa:
  rev
  (example)

• Microdata:
  itemprop-reverse (non-standard, which is one of the reasons to prefer RDFa over Microdata)
  (example)

• JSON-LD:
  @reverse
  (example)