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The main reason to compare web pages is to find and to analyze changes that were made on this web-site. Best solution is comparing of page's content, but not htm tags within page. Choose solution that fits your needs. Decide first why you need to compare .htm files or other document. If you are web-master and need to know details about all html tags or you need to collect text information fast and stay informed only about text of main tags.
Why the need for comparing web pages?
As we use comparison to find changes that were made in document, then comparison of web-pages is for the same reason.
Once you've visited some web-page you can save the page to your hard disk and compare with previous version of the same page. The result of comparison is the idea about what was changed and what was added and what was deleted.
Analyze this data to find out what author of web page was doing with his article, idea or business.
Known solutions
As another comparison process this involve comparing of files and most of comparison programs suggest to compare not a text of web-page, but htm tags with "<p>", "<href..." and other.
This is useful when you are webmaster and want to find all the changes that were made. But main idea of comparing of web-page is to find out changes that were made in content but not in document's structure.
When comparing .htm file you need information about changes that were made in document structure, i.e. column's color or size was changed or other, that you can freely use any compare tool.
When comparing .htm file you want to get information about content changes and about changes of some important tags (such as image ALT tag) or .htm link, then you should use product allows to compare web pages as a text.
Compare Suite Solution
Compare Suite suggests both comparison types -- comparing .htm as a text and comparing .htm as a document written in HyperText Markup Language (.html).
Here you can see two documents. Both are this article, but the first one is old version of this article with no text typed.
As you can see I've changed description, keywords and title tags of this document and the picture that the result of comparison with Compare Suite.
Another picture shows changes that were made - Compare Suite highlight changes that were made in text of the web page.
Now, I'm disabling Compare Suite's htm2txt filter so Compare Suite will do not a comparison of two web-pages but a comparison of two documents, written in HyperText Markup Language (.html). It's useful if you are web-master.
I select Options command in Tools menu. Go to Plug-ins -> Html tab and check off the "Converter enabled" check box. I click "OK" and then click Compare Button on tool bar (or just press F5 button on keyboard.
The result of comparison of two .htm files, represented as HyperText Markup Language text. It's useful for webmasters as shows changed .htm tags.
This picture is another part of compared documents:
As you can see, it is not easy to understand what changes were made in web-page's text. Just compare this picture with comparison or web page as a text:
Choosing solution
Chose solution that fits your needs. Decide first why you need to compare .htm files or other document. If you are web-master and need to know details about all html tags or you need to collect text information fast and stay informed only about text of main tags.
Compare Suite suggest you solution for both roles. And more over, it provides you with ability to compare another office documents - such as MS Office files (.doc, .xls) or Adobe Acrobat files (.pdf).
Being advanced user you can always configure Compare Suite to compare binary files or .htm files as a set of html tags. It easy to do with Options menu.
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