How to index a Blog as a search engine?

I want to create a simple search engine for learning purpose.

I want to know how to index a simple blog site.

A blog site has many pages and in every page there is a blogpost. But in every page there are other stuff in common as well ( header, footer, category block and other stuff ).

In your opinion, How can I index this blog ?

The prog开发者_运维百科ram language doesn't matter obviously.

You can use the quite powerfull Zend Lucene search engine for that (PHP 5).

http://framework.zend.com/manual/en/zend.search.lucene.html