G'day Xevven,

Welcome to the monastery.

"I think, this section is too complicated to match with RegExp, do you agree?"

No, I don't agree. On the basis of the data you've shown, this regex works just fine:

my $re = qr{
    <div \s+ class="sectionHeading">.*?</div>\s+
    <div \s+ class="sectionContent">.*?</div>\s+
}msx;
[download]

Here's my test:

#!/usr/bin/env perl

use strict;
use warnings;

my $re = qr{
    <div \s+ class="sectionHeading">.*?</div>\s+
    <div \s+ class="sectionContent">.*?</div>\s+
}msx;

my $html = do { local $/; <DATA> };

$html =~ s/$re//;

print $html;

__DATA__
<!-- KEEP -->
<div class="sectionHeading">REMOVE_THIS</div>
<div class="sectionContent">
<table class="sectionTable" ...
...
</table>
</div>
<!-- KEEP -->
[download]

I added the <!-- KEEP --> comments as markers. I used all the <table>...</table> data exactly as you posted: I saw no reason to repeat it all again here.

Here's the output:

<!-- KEEP -->
<!-- KEEP -->
[download]

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