- From: Ian Jacobs <ij@w3.org>
- Date: Wed, 26 Jan 2000 08:58:43 -0500
- To: "John A. Grant" <jagrant@gsc.nrcan.gc.ca>
- CC: www-html-editor@w3.org
"John A. Grant" wrote: > > On this page: > http://www.w3.org/TR/html401/struct/objects.html#edef-AREA > > It states: > "Coordinates are relative to the top, left corner of the object. All values are lengths. All values are separated by commas" > However, it doesn't say if the (x,y) are 0-based or 1-based. Is the top left >corner (0,0) or (1,1)? I'm guessing (0,0), but I'm a technical person. Others > might think (1,1). I will ask the WG for clarification. > Also it says "all values are lengths". Surely the (x,y) are not "lengths"? A >length doesn't have the concept of a reference point like (0,0). The (x,y) are >"co-ordinates", rather than "lengths". But you don't have "co-ordinate" as a basic >element type - perhaps there should be such a type. This distinction is akin to >the difference between a scalar (speed) and a vector (velocity) quantity. The term "length" is linked to and it is explained that in the context of this document, a length value may be either a %Pixel; value or percentage of the available horizontal or vertical space. We chose the term length (for better or worse) to group these two values under one term. - Ian -- Ian Jacobs (jacobs@w3.org) http://www.w3.org/People/Jacobs Tel/Fax: +1 212 684-1814 or 212 532-4767 Cell: +1 917 450-8783
Received on Wednesday, 26 January 2000 08:59:22 UTC