Really Simple Syndication (RSS) Programming Question:
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Are Atom Feed Files XML Documents?
Answer:
Yes. Atom feed files are XML (eXtensible Markup Language) documents. Atom feed files must be well-formed XML documents, respecting the following XML rules.
► The first line must be the "xml" processing instruction with "version" and "encoding" attributes.
► There must be only one root element in a single XML document.
► All elements must be closed with the closing tags.
► One element can be nested inside another element.
► One element can not be partially nested inside another element.
► Element attribute values must be quoted with double quotes.
► Special characters in element attribute values or element contents must be protected using entities, like < and >.
► The first line must be the "xml" processing instruction with "version" and "encoding" attributes.
► There must be only one root element in a single XML document.
► All elements must be closed with the closing tags.
► One element can be nested inside another element.
► One element can not be partially nested inside another element.
► Element attribute values must be quoted with double quotes.
► Special characters in element attribute values or element contents must be protected using entities, like < and >.
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