Some web standard advocates, including The Web Standards Project, criticized that definition of "HTML5" as an umbrella term, pointing out the blurring of terminology and the potential for miscommunication.
Beberapa pendukung standar web, termasuk Proyek Standar Web (The Web Standards Project), mengkritik definisi "HTML5" sebagai istilah umum, terutama bahwa terjadi pengaburan terminologi dan potensi munculnya miskomunikasi.