Macromedia dreamweaver 8-extending dreamweaver User Manual

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Server Models
The Server Model API functions
This section describes the functions that configure server models for Dreamweaver.
canRecognizeDocument()
Availability
Dreamweaver MX.
Description
When opening a document (and when more than one server model claims a file extension), 
Dreamweaver calls this function for each of the extension-associated server models to see 
whether any of the functions can identify whether the document is its file. If more than one 
server model claims the file extension, Dreamweaver gives priority to the server model that 
returns the highest integer. 
Arguments
dom
The 
dom
 argument is the Macromedia document object, which is returned by the 
dreamweaver.getDocumentDOM()
 function.
Returns
Dreamweaver expects an integer that indicates the priority that you give to the server model 
for the file extension. This function should return a value of 
-1
 if the server model does not 
claim the file extension; otherwise, this function should return a value greater than zero.
Example
In the following example, if the user opens a JavaScript document for the current server 
model, the sample code returns a value of 
2
. This value lets the current server model take 
precedence over the Dreamweaver default server model. 
var retVal = -1;
var langRE = /@\s*language\s*=\s*(\"|\')?javascript(\"|\')?/i;
// Search for the string language="javascript"
var oHTML = dom.documentElement.outerHTML;
if (oHTML.search(langRE) > -1)
   retVal = 2;
return retVal;
NO
TE
All Dreamweaver-defined server models return a value of 1, so third-party server models 
can override the file-extension association.