For creating a program for interpreting HTML code, follow the steps shown in the following steps:

We have used ignoring case since the tag names may start with upper or lowercase such as H1 or h1. The regular expression searches for tags starting with a <, then followed by a single alphabet (denoted in regex by u), followed by zero or more alphanumeric characters. After this, an optional substring (comprising of all characters except for a > may be found, followed by a > character. This will match HTML tag names such as H1, H2, HTML, or html. The tag name without the special characters < and > is assigned to a subgroup that is then available in the submatch variable tagname. The start and end of the tag is checked using the back-referencing operator 1. Note that in this case, the forward slash / is part of the HTML code denoting the end of the tag. The content of a particular tag is read into the submatch variable tagcontents.

The find statement finds all the tags. Once a tag is processed, we replace the tag name as $$$ in order to avoid it to be found by the find statement another time. On the next do loop pass, the next tag is matched and contents are read.

Using a WRITE statement, all the tag names and tag contents are printed on screen. The output is shown in the following screenshot:

Once all the tags are processed, the sy-subrc condition of being not equal to zero is met and the loop is exited.