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Like Quanta screem will display the document structure, and also features auto complete in via a dropdown menu when typing.

Like Quanta screem has no problem with Docbook support, or any other XML format so long as the document contains a doctype tag.

Like Quanta screem will auto complete entities, and typing / will result in the correct closing tag being inserted, for any doctype in use.

Like Quanta screem can work directly with remote files.

Like Bluefish it has references. The exact same PHP and Python ones used in Bluefish. It also supports PHP, Perl, Python, C, SQL. Just like Bluefish.

The "few other" protocols supported by screem are infact anything that gnome-vfs supports.

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