Are there any softwares that can do these:

1. Read html file, and while reading the file, you can highlight the important points (just like when you're reading book, you use highlighter). But the software do not alter the html file itself (like any html editor), but just attach some info to the html file that can be easily removed later.

2. Open jpeg picture, then attach note to it without altering the jpeg file itself (like exifeditor). I know software like gqview can attach note to the file, but if you move the file to other place later, the note is gone (so does Nautilus).

Or do you have any ideas to do such things in other way? In the first case, I have lots of lecture notes/books in html format, and I would like to highlight them while reading the files. In the second case, being a student in medical field, I'd like to add notes to picture that I took/have. Any clues, guys?

OpenOffice can edit html in such a way as you describe. As far as not changing the code I'm not really sure what you mean. You can save the file under a new name and retain the original, other than that it sounds impossible to modify a file without modifying the file. I suppose some sort of tag file is possible but your still talking about another file so you might as well save the changes to another file.

Also if your just highlighting then the highlighting could be easily removed globally using 'no fill' as long as there is no highlighting already in the files. I guess another more basic way to do this would be to use something like diff and create some diff files. I would probably just go with seperate html files since html files are usually fairly small anyway.

Thanks for reply. What I have in mind is that let say I have this abc.htm file. I am reading this abc.htm file using full featured browser/html viewer. I want to highlight some important points in the text. Click the highlighter then highlight the text. Then when I quit, it saves the highlighted text info by attaching some small info to the file then giving the html file new name abc.htm.hl. Later when you want to reuse the html file or give it to other people, just use some kind of .hl remover, then it removes the info form the html file.

If you open the file in Openoffice then saves it later, usually the formatting of the html file will be changed a bit, with added tags, and extra formatting (as I noticed, Microsoft Words is the worst). If you handcoded the html file, you'll be annoyed with the added text. So, I'm thinking if there is any software that just add some script/info in the end of the html file (below the </html> tag), which can be easily removed later without altering original file.

Besides, it is no fun reading html file in Openoffice/html editor anyway, you'd like to read it in Browser.

As far as I know, Amaya is the only web browser that has an edit-mode.
Next, what you want is *maybe* doable but it surely does not exist. So it would surely require some coding/scripting.

Yves.