Section[1] only in toc

I have an abnormal use case.

The source file is a book with many articles, however the TOC is to be
first level sections of each article and not the article title itself.

Example:

<article>
<info><title></info>                                     -- not included
<section><info><title></info></section>     -- included
<section><info><title></info></section>     -- included
...
</article>
<article>
<info><title></info>                                     -- not included
<section><info><title></info></section>     -- included
<section><info><title></info></section>     -- included
...
</article>

Any pointers would be appreciated.

Thanks,

Peter