How can I parse data from inside a tag with Applescript?

Question

How can I parse data from inside a tag with Applescript? I know Applescript has the words 3 thru -2 of myTextVariable syntax - but how would I use it to be sure I am just getting
This is my text from the tags below?

<p>This is my text</p>

or

<p class="new">This is my text</p>

or

<h1>This is my text</h1>

or

<content class="new" id="content">This is my text</content>

Answer 1

I'd just use regex in the shell or in some shell scripting language:

paragraphs of (do shell script "/bin/echo " & quoted form of "<p class=\"new\">yyy</p><p>uuu</p>" & " | ruby -e 'puts $<.read.scan(/<p.*?>(.+?)<\\/p>/)'")