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How Dreamweaver Templates Work
This article describes how Dreamweaver implements templates. Technically, you don’t need to know any of the information given in this article to use Dreamweaver templates; but it’s useful to know something about what’s going on under the hood in case you need to troubleshoot a document based on a Dreamweaver template.
Templates are a tool used in many computer applications, such as Microsoft Word, AutoCAD, and other office and design products. Templates are useful when you have a group of documents that share many similar design characteristics. Implement the common features once in the template and then only customize the template with the individual features of each document.
Templates are only used at design time
It’s important to understand that Dreamweaver templates are entirely a design-time construct. Only two things separate a Dreamweaver template from any other HTML document:
1. Dreamweaver template documents have a “.dwt” extension.
2. Dreamweaver templates contain specially defined HTML comments that define the editable and non-editable area of the template.
When you create an “instance” document that is based on a Dreamweaver template and store it on a web server, the web server is completely unaware that the document was based on a template. Treats the document like any other HTML document and ignores comments in the document template just as it would ignore any other comments in an HTML document.
Likewise, a web browser would be completely unaware that a document was based on a Dreamweaver template, and would also ignore comments in the template just as it would ignore any other comments in an HTML document.
Dreamweaver has two sets of tags:
* Template tags are used in template files (files that have a .dwt suffix).
* Instance tags are used in “instance” documents you create based on a template file (files that usually have a .htm or .html suffix).
Dreamweaver defines about thirty different template tags, but they all have the following syntax:
where TEMPLATE_TAG_NAME and parameters are replaced with an actual template tag name and actual parameter names. For example:
In the example above, the template tag is a TemplateBeginEditable tag named “Region 1”.
The syntax for instance tags is quite similar:
Many template tags are paired, with an opening tag and a closing tag. For example, the “TemplateBeginEditable” tag described above always starts an editable region that ends with a “TemplateEndEditable”. The two tags come as a pair, defined as follows:
— HTML code goes here —
One of the simplest and most important things Dreamweaver does with template/instance tags is define which regions of an instance document (a document created from a template document) can be edited. BUT ATTENTION. . . If you use Dreamweaver to open a document based on a template in CODE VIEW, you can edit any part of the document in any way you want, but it’s generally not a good thing. In Dreamweaver’s document layout view, Dreamweaver respects instance tags that are included in a document; for example, it will only allow you to edit areas of the document that begin with an “InstanceBeginEditable” (or similar type) tag.
When you’re done editing your web page, the Dreamweaver instance tags will remain, but as mentioned above, these tags are ignored by your web server and browser.
Finally, if you update a template in Dreamweaver, all documents based on the template will also be updated.
Dreamweaver templates work by using specially defined HTML comment tags to mark regions of Dreamweaver template documents and instance documents. You should recognize Dreamweaver’s template and instance tags and understand what they do, but you should only edit them in Dreamweaver’s design view, not code view. For more information on how to actually use Dreamweaver’s templates, check out my next article “Dreamweaver Tip: Build Better Websites Faster with Templates.”
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