Schema.org - How can you define an object across multiple pages?
问题 Using schema.org markup, if I define many items with the same name across multiple pages, but with different sets of properties defined on each page, is each item only relevant within the scope of the page it is defined on, or is there a way to tie all of them items together to create a single, complete definition? 回答1: Syntax: itemid Microdata defines an itemid attribute: […] to give a global identifier for the item, so that it can be related to other items on pages elsewhere on the Web. The