XTRAN Example — Analyze HTML Tag & Attribute Usage
XTRAN treats HTML as a computer language, in which each tag, line or segment of nonmarkup text, or end tag is a "statement", and each tag attribute is a "statement attribute".
The following example uses an XTRAN rules file comprising 102 non-comment lines of XTRAN's rules language ("meta-code") to analyze and tally all tags and attributes used in HTML.
The following is an English paraphrase of the XTRAN rules used for this example.
For each HTML tag occurrence Tally tag occurrence For each of tag's attributes if any Tally attribute occurrence for tag Sort tags For each HTML tag seen, alphabetically Report tag tally Sort attributes for tag For each attribute seen for this tag, alphabetically Report attribute tally
Here is a flowchart for this process, in which the elements are color coded:
- BLUE for XTRAN versions (runnable programs)
- ORANGE for XTRAN rules (text files)
- RED for
- PURPLE for text data files
Output from XTRAN:
Running these rules on this HTML page generated the following XTRAN analysis output:
HTML Tag and Attribute Usage !DOCTYPE 1 A 5 HREF 5 B 11 BODY 1 LINK 1 VLINK 1 BR 10 FONT 2 COLOR 1 FACE 2 SIZE 2 H3 1 HEAD 1 HR 2 SIZE 2 HTML 1 IMG 2 ALT 2 BORDER 1 HEIGHT 2 SRC 2 WIDTH 2 META 3 CONTENT 3 HTTP-EQUIV 1 NAME 2 P 7 ALIGN 1 PRE 2 TITLE 1