p nested within elements, elements nested within p

Classified as: flow content, palpable content

Children, p

Valid Syntax 1
1 2 3 4 5 6 7 8 9 10 11	<!doctype html> <html> <head> <title>...</title> </head> <body> <p>...</p> </body> </html>

Valid Syntax 2
1 2 3 4 5 6 7 8 9 10 11 12 13	<!doctype html> <html> <head> <title>...</title> </head> <body> <p> <a>...</a> </p> </body> </html>

Invalid Syntax 3
1 2 3 4 5 6 7 8 9 10 11 12 13 14	<!doctype html> <html> <head> <title>...</title> <p>...</p> </head> <body> <h1> <p>...</p> </h1> </body> </html>

Syntax 1: Valid, p nested within body: allowed
Syntax 2: Valid, a nested within p: allowed
Syntax 3: Invalid, p nested within head, h1: not allowed