This page lists all the simple Schemas that we give examples of here on XooCode.com. Simple Schemas are schemas which in most use cases are composed of only one string. Because the Schema is only one single string long, it is customary to declare the data in that string. It is still possible to use the @id attribute introduced in JSON-LD as a reference to data on another webpage if so desired. There should always be a specific reason to use @id in simple Schemas, as normally it is shorter to avoid it.
For more information on JSON-LD, please expand the FAQ below.