The extending_dw.pdf file has this definition of the tag attribute within an insertbar button:

tag="editor"

DescriptionT
his attribute tells Dreamweaver to invoke a Tag editor. In Code view, if the tag attribute is defined and the user clicks the object, Dreamweaver invokes the Tag dialog box. In Code view, if you specify the tag and command attributes, Dreamweaver invokes the Tag editor. In Design view, if codeOnly="TRUE" and you do not specify the file attribute, Dreamweaver MX invokes Split view, places focus in the code, and invokes the Tag editor.Example tag = "form"

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Now what I have found is that if I omit this tag, my insertbar button works beautifully, and if I put something in, nothing works, and of course there are zero clues to be found from DreamWeaver ass to why it can not cope. (Yes, I'm extremely frustrated with DreamWeaver's lack of feedback during the process of extending tags.)

So -- does anyone have experience using the TAG attribute and know what the "editor" phrase must link to in order to function???

TIA.