Numbers that start at 0x80 encode a map, so 0x84 is a four-element map. For arrays, the prefix is 9 instead of 8 and strings start with either 0xA0 or 0xB0, so you can have up to 32 characters ...

There are however other use cases where it makes sense to use Schema.org JSON-LD and Microdata format. ... This means, for example, that you can have a heading element (H1, H2, ...