Adds extra fields to the feed.
The key of the extra field.
The value of the extra field.
The Feed instance (for chaining).
Adds a start link to the feed. This is a convenience method for adding a start link with the appropriate rel and type.
The URL of the start link.
The Feed instance (for chaining).
Sets the author of the feed.
The author of the feed.
The Feed instance (for chaining).
Sets the language of the feed.
The language of the feed. (e.g. 'en', 'de', etc.)
The Feed instance (for chaining).
Sets the updated date of the feed.
The updated date in ISO 8601 format.
The Feed instance (for chaining).
Converts the feed to an OPDS/Atom XML string.
The feed as an XML string.
Adds multiple entries to the feed.