xmlBlueprint is fast on Windows because it is a native Windows application, not Java. Of course you cannot use a native Windows application anywhere else. I work on some projects where I alternate between Windows, Linux, and Solaris so will not use xmlBlueprint for those projects.
This editor can validate input data against a DTD or an XML schema to ensure the output is clean XML. The editor is supplied with default schemas for DocBook, GPX, JSP, MathML, SOAP, SVG, XHTML, XSFO, and XSLT.
XML Schema Creation
The editor does not directly create XML schemas, something I need. Perhaps the developers could include an XML schema for creating an XML schema along with a tutorial or link to a tutorial.
xmlBlueprint costs US$45. With so many free open source XML editors available, I would not pay US$45 for xmlBlueprint unless it offered a specific advantage. Speed is one advantage but I do not use XML editors enough to pay for speed alone. If you edit a lot of XML on Windows then US$45 is a small price to pay for a fast editor.
FTP and WebDAV
xmlBlueprint supports FTP and WebDav which means you can edit files on a server without transferring the files to your local machine. If you are using version control with older version control software, you will have to use your version control software to transfer the files. WebDAV lets you connect direct to a new style version control system on your server and edit the files while still under version control.
The download is only 2.5 MB but it requires MSXML which is a further 5 MB. msxml.dll is already installed in Windows 2000.
US$45 for xmlBlueprint is a small price to pay for a fast editor if you edit a lot of XML under Windows.