Slide 11.16: WML GO and POSTFIELD tags

Slide 11.15: WML input fields (cont.)
Slide 11.17: WML variables, comments, and character entities
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WML GO and POSTFIELD Tags

GO Tag
The <go> task represents the action of going to a new card.

The content for the <go> tag is optional.
The <go> tag can contain <postfield> or <setvar> tag.

Where to go is specified with the href attribute. For example,

   <go href="someurl" method="method">
      ... <postfield> ...
      ... <setvar> ...
   </go>

href: It is required and is the URL of the new card. The URL usually cannot exceed 255 characters in length.

method: The optional method attribute dictates the HTTP submission method. There are only two permitted values:
- post: A post submission includes the data with the submission. The encoded form input is sent via stdin.
- get: A get submission appends the data as a query to the URL. The encoded form input in the environment variable QUERY_STRING.

POSTFIELD Tag
The <postfield> tag is used to set a name/value pair that can be transmitted to an origin server (source of the request) during a URL request. The name is set by the name attribute and must be a valid WML variable name. The value is set by the value attribute. For example,

   <postfield name="somename" value="somevalue"/>

A <go> element can contain one or more <postfield> elements. If the destination of a <go> element is a card within the same deck, all of the <postfield> elements will be ignored.