Hi, In a text file, I want to check whether all the tags used are exclusively from the array of given set of elements. Below is the code, I use for this.

my $file = $_;
my @tags=(qw(kt bold ital ch([^>]*)));
my %allowed_tag = map { $_ => 1 } @tags;
while (defined (my $line = <F1>)) {
   $line =~ /<([^>].+)>/;
   my $tag = $1;
   die "Invalid element $tag in $.. Cannot proceed due to the above er
+ror\n"
unless exists $allowed_tag{$tag};

[download]

This works well when there are no attributes to the tag i.e., the first three elements in the array kt, bold, ital. But I also need to allow elements which has partly variable content in it. For example, the tag for chapter will be <ch1>. The last number indicates the chapters actual number. I also have tags like <fig n="1">. If I use a regular expression (like what I had done above), the script does not ignore the tag. It reports a error. Can anyone help me out? The markup is not XML, so I cannot use any XML modules.

In reply to Matching elements in a array by rsriram

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.