We have this software that has a webservices component.
Now, the administrator of this system has come to me, wanting to import data into the system by using the webs
PUT and DELETE are not part of HTML4, but are included in the HTML5 specifications. For this reason, most popular browsers don't have good support for them, since they focus on HTML4. However, they are definitely part of HTTP and always have been. You do a PUT using some non-browser client, or using a form in an HTML5-ready browser.
Update: PUT and DELETE are no longer part of HTML5 for forms. See: http://www.w3.org/TR/html5/association-of-controls-and-forms.html#attr-fs-method