Table 1. Description of the used symbols in the HTM topic model.

Symbol	Description
α	Per-document topic distributions
β	Per-topic word distribution
θ1	Topic distribution for TG
θ2	Topic distribution for WP
ψ	Word distribution for T
Z	Topics of the n-th word in TG
W	Specific word
V	Set of words in the vocabulary
WP	Webpage
TG	HTML Tag
N	is the number of words in a given document