Multiple Schema.org markups on a single page

Question

We have several Schema.org items on a single page. For example, a category page has BreadcrumbList markup to show navigation and ItemList markup to show products. A product page has Product markup plus BreadcrumbList markup and (sometimes) several ItemLists (upsells and crossells). ListItems are always Product markup.

Some are implemented as <script type="application/ld+json"> and some are inline markups.

Structured Data Testing Tools show no error or warning.

All these markups are unrelated (physically) to each other. That is they are not included in a single "GlobalPage" markup.

Is it correct to include several markups on a single page?

In fact I used Microdata all the time and I think it is more "natural" but after GWT (now Search Console) showed the only "correct" example for product I change it to ld+json format (w/out seo improvement). SDTT means nothing. GWT still shows "Start with..." even if everything were 5* for years.

I understand that no true answer may exist (untraceable route of Google) but I want to hear an expert opinion on the subject.

Answer 1

Yes, it’s fine to describe multiple entities on the same page. But, if possible, you should use properties to relate these entities.

For your examples:

• For a category page, you can use CollectionPage and its properties breadcrumb (for the BreadcrumbList entity) and mainEntity (for the ItemList entitiy that contains the products).

• For a product page, you can use ItemPage with the same properties, but here the mainEntity property references a Product entitiy as value. Schema.org also defines properties for related products (but they don’t expect an ItemList as value).

If using different syntaxes on the same page (e.g., JSON-LD and Microdata) this becomes harder; you would have to define a URI for each entity (in JSON-LD with @id, in Microdata with itemid) and reference these URIs as values for the properties. If using only one syntax, you can simply nest the entities.