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A channel may contain any number of <item>s, each of which links to a story, with an optional description:
| <!ELEMENT item (title | link | description)*> | |
| Required <item> sub-elements | |
| <!ELEMENT title (#PCDATA)> | the title of the story. Maximum length is 100. |
| <!ELEMENT link (#PCDATA)> | the URL of the story. Maximum length is 500. |
| Optional <item> sub-elements | |
| <!ELEMENT description (#PCDATA)> | the story synopsis. Maximum length is 500. |
An <image> is a sub-element of <channel>, which contains three required and three optional sub-elements:
| <!ELEMENT image (title | url | link | width? | height? | description?)*> | |
| Required <image> sub-elements | |
| <!ELEMENT url (#PCDATA)> | the URL of a GIF, JPEG or PNG image that represents the channel. Maximum length is 500. |
| <!ELEMENT title (#PCDATA)> | describes the image, it's used in the ALT attribute of the HTML <img> tag when the channel is rendered in HTML. Maximum length is 100. |
| <!ELEMENT link (#PCDATA)> | the URL of the site, when the channel is rendered, the image is a link to the site. (Note, in practice the image <title> and <link> should have the same value as the channel's <title> and <link>. Maximum length is 500. |
| Optional <image> sub-elements | |
| <!ELEMENT width (#PCDATA)> | the width of the image in pixels. Maximum value is 144, default value is 88. |
| <!ELEMENT height (#PCDATA)> | the height of the image in pixels. Maximum value is 400, default value is 31. |
| <!ELEMENT description (#PCDATA)> | contains text that is included in the TITLE attribute of the link formed around the image in the HTML rendering. |
A channel may optionally contain a <textInput> sub-element, which contains four required sub-elements:
| <!ELEMENT textinput (title | description | name | link)*> | |
| Required <textinput> sub-elements | |
| <!ELEMENT title (#PCDATA)> | The label of the Submit button in the text input area. Maximum length is 100. |
| <!ELEMENT description (#PCDATA)> | Explains the text input area. Maximum length is 500. |
| <!ELEMENT name (#PCDATA)> | The name of the text object in the text input area. Maximum length is 20. |
| <!ELEMENT link (#PCDATA)> | The URL of the CGI script that processes text input requests. Maximum length is 500. |
Nota bene: RSS 0.91 places restrictions on the first non-whitespace characters of the data in <link> and <url> elements. The data in these elements must begin with http:// or ftp://. Among others, https:, file:, mailto:, news:, and javascript: are not permitted.
Let's look at a full-fledged example.
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URL: http://www.webreference.com/xml/column13/3.html
Created: Jun 18, 2000
Revised: Jun 18, 2000
