Tag Usage

We examined the distribution of tags. We obtained a list of valid tags from the Sandia HTML Reference Manual [HANN95]. The average number of total tags per document was 71. The average number of unique tags per document was 11.

We examined the most popular tags. The top graph indicates the top ten tags (ranked according to the number of documents in which the tag appeared at least once). The bottom graph indicates the average number of occurrences of the tag per document.

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Ten Most-Used Tags

We also examined the least popular tags. Several tags, BDO, COLGROUP, and NOEMBED were used zero times in our data set of over 2.6 million HTML documents. A number of other tags appeared a very limited number of times.