# Universal Feed Parser

Parse RSS and Atom feeds in Python. 3000 unit tests. Open source.

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## feed.subtitle_detail

A dictionary with details about the feed subtitle.

### Comes from

- `/atom10:feed/atom10:subtitle`
- `/atom03:feed/atom03:tagline`
- `/rss/channel/description`
- `/rss/channel/dc:description`
- `/rss/channel/itunes:subtitle`
- `/rdf:RDF/rdf:channel/rdf:description`
- `/rdf:RDF/rdf:channel/dc:description`

### See also

- feed.subtitle

### feed.subtitle_detail.value

Same as feed.subtitle.

If this contains HTML or XHTML, it is sanitized by default.

If this contains HTML or XHTML, certain (X)HTML elements within this value may contain relative URIs. If so, they are resolved according to a set of rules.

### feed.subtitle_detail.type

The content type of the feed subtitle.

Most likely values for `type`:

- `text/plain`
- `text/html`
- `application/xhtml+xml`

For Atom feeds, the content type is taken from the `type` attribute, which defaults to `text/plain` if not specified. For RSS feeds, the content type is auto-determined by inspecting the content, and defaults to `text/html`. Note that this may cause silent data loss if the value contains plain text with angle brackets. There is nothing I can do about this problem; it is a limitation of RSS.

Future enhancement: some versions of RSS clearly specify that certain values default to `text/plain`, and Universal Feed Parser should respect this, but it doesn't yet.

### feed.subtitle_detail.language

The language of the feed subtitle.

`language` is supposed to be a language code, as specified by RFC 3066, but publishers have been known to publish random values like “English” or “German”. Universal Feed Parser does not do any parsing or normalization of language codes.

`language` may come from the element's `xml:lang` attribute, or it may inherit from a parent element's `xml:lang`, or the `Content-Language` HTTP header. If the feed does not specify a language, `language` will be `None`, the Python null value.

### feed.subtitle_detail.base

The original base URI for links within the feed subtitle.

`base` is only useful in rare situations and can usually be ignored. It is the original base URI for this value, as specified by the element's `xml:base` attribute, or a parent element's `xml:base`, or the appropriate HTTP header, or the URI of the feed. (See Relative Link Resolution for more details.) By the time you see it, Universal Feed Parser has already resolved relative links in all values where it makes sense to do so. Clients should never need to manually resolve relative links.

← feed.subtitle
feed.rights →