"XML parsing error: <unknown>:2:0: unbound prefix" in Podcast RSS feed
"XML parsing error: <unknown>:2:0: unbound prefix" in Podcast RSS feed
我正在尝试 self-publish 我的播客使用我自己编写的 RSS 提要。当我检查它是否在 https://validator.w3.org/feed/ 验证时，我一直在标题中收到错误，它说错误在第 2 行，即 RSS 标签本身。我一遍又一遍地检查代码并将其与有效的 RSS 提要进行比较，结果完全一样，所以我不知道问题出在哪里，w3 也没有给我任何修复方法的指示。这是我的代码：
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
xmlns:media="http://search.yahoo.com/mrss/"
xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
xmlns:dcterms="http://purl.org/dc/terms/"
xmnls:spotify="https://www.spotify.com/ns/rss"
xmlns:atom="http://www.w3.org/2005/Atom">
如果有人能告诉我我做错了什么以及如何解决它以便 feed 生效，我们将不胜感激。
编辑以包含完整代码：
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
xmlns:media="http://search.yahoo.com/mrss/"
xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
xmlns:dcterms="http://purl.org/dc/terms/"
xmnls:spotify="https://www.spotify.com/ns/rss"
xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<!-- Main Information -->
<Title>Entitled Gamers</Title>
<description>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</description>
<link>https://www.mobomu.com/podcasts/entitledgamers/entitledgamers.html</link>
<image>
<url>https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg</url>
</image>
<!-- Optional Information -->
<language>en-US</language>
<copyright>Copyright 2020, Mobomu Gaming Network</copyright>
<managingEditor>poopshizzle@mobomu.com</managingEditor>
<webMaster>herc@mobomu.com</webMaster>
<!-- iTunes Specifics -->
<itunes:author>Mobomu</itunes:author>
<itunes:owner>
<itunes:name>Mobomu</itunes:name>
<itunes:email>entitledgamers@mobomu.com</itunes:email>
</itunes:owner>
<itunes:image url="https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg"/>
<itunes:category text="Leisure">
<itunes:category text="Video Games" />
</itunes:category>
<itunes:category text="Comedy" />
<itunes:category text="News">
<itunes:category text="Entertainment News" />
</itunes:category>
<itunes:summary>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</itunes:summary>
<itunes:type>episodic</itunes:type>
<!-- Spotify Specifics -->
<spotify::countryOfOrigin>us</spotify::countryOfOrigin>
<!-- Episode 1 -->
<item>
<title>Games are Getting More Expensive?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitledgamers/audio/episode-001.mp3"
length="103132759" type="audio/mpeg"/>
<description>NBA 2K sparks the AAA game price hike conversation. Ninja streams to YouTube without a contract. And Destiny 2's Twitch plugin breaks site-wide subtrain records for big streamers.</description>
<guid>fd63b88b-2714-43c4-9840-d2dc247dda33</guid>
<pubDate>Sun, 12 Jul 2020 14:50:59 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>42:57</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>1</itunes:episode>
<itunes:season>1</itunes:season>
<itunes:explicit>no</itunes:explicit>
</item>
<!-- Episode 2 -->
<item>
<title>Are Gamers Tired of Battle Royales?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitlegamers/audio/episode-002.mp3"
length="96854827" type="audio.mpeg"/>
<description>Ubisoft's HyperScape is a new Battle Royale game that resurfaces the age-old "gamers are tired of this genre" conversation, but are they really?</description>
<guid>33bdc13a-8c1a-430e-a7c3-709b0d1928e4</guid>
<pubDate>Sun, 19 Jul 2020 17:00:00 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>40:21</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>2</itunes:episode>
<itunes:season>1</itunes:season>
<itunes:explicit>no</itunes:explicit>
</item>
</channel>
</rss>
编辑 2：感谢下面 kjhughes 的帮助，我能够解决我的 RSS 标签中的错误（这是一个打字错误），然后 w3 能够在我的代码中找到更多的错误，一旦他们都已修复，已验证。我将 post 经过验证的 RSS 提要代码供可能遇到类似问题的其他人参考：
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<!-- Main Information -->
<title>Entitled Gamers</title>
<description>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</description>
<link>https://www.mobomu.com/podcasts/entitledgamers/entitledgamers.html</link>
<image>
<title>Entitled Gamers</title>
<link>https://www.mobomu.com/podcasts/entitledgamers/entitledgamers.html</link>
<url>https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg</url>
</image>
<atom:link href="https://www.mobomu.com/podcasts/entitledgamers/rss/feed.xml" rel="self" type="application/rss+xml" />
<!-- Optional Information -->
<language>en-US</language>
<copyright>Copyright 2020, Mobomu Gaming Network</copyright>
<managingEditor>poopshizzle@mobomu.com (PoopShizzle)</managingEditor>
<webMaster>herc@mobomu.com (SamuraiHerc)</webMaster>
<!-- iTunes Specifics -->
<itunes:author>Mobomu</itunes:author>
<itunes:owner>
<itunes:name>Mobomu</itunes:name>
<itunes:email>entitledgamers@mobomu.com</itunes:email>
</itunes:owner>
<itunes:image href="https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg"/>
<itunes:category text="Leisure">
<itunes:category text="Video Games" />
</itunes:category>
<itunes:category text="Comedy" />
<itunes:category text="News">
<itunes:category text="Entertainment News" />
</itunes:category>
<itunes:summary>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</itunes:summary>
<itunes:type>episodic</itunes:type>
<itunes:explicit>clean</itunes:explicit>
<!-- Episode 1 -->
<item>
<title>Games are Getting More Expensive?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitledgamers/audio/episode-001.mp3"
length="103132759" type="audio/mpeg"/>
<description>NBA 2K sparks the AAA game price hike conversation. Ninja streams to YouTube without a contract. And Destiny 2's Twitch plugin breaks site-wide subtrain records for big streamers.</description>
<guid isPermaLink="false">fd63b88b-2714-43c4-9840-d2dc247dda33</guid>
<pubDate>Sun, 12 Jul 2020 14:50:59 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>42:57</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>1</itunes:episode>
<itunes:season>1</itunes:season>
</item>
<!-- Episode 2 -->
<item>
<title>Are Gamers Tired of Battle Royales?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitlegamers/audio/episode-002.mp3"
length="96854827" type="audio/mpeg"/>
<description>Ubisoft's HyperScape is a new Battle Royale game that resurfaces the age-old "gamers are tired of this genre" conversation, but are they really?</description>
<guid isPermaLink="false">33bdc13a-8c1a-430e-a7c3-709b0d1928e4</guid>
<pubDate>Sun, 19 Jul 2020 17:00:00 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>40:21</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>2</itunes:episode>
<itunes:season>1</itunes:season>
</item>
</channel>
</rss>
一般
必须声明使用中的所有 XML 前缀命名空间。
具体来说，文档中每个 XML 元素名称的格式为，
nspref:LocalName
必须这样声明
xmlns:nspref="http://example.com/ns"
在 nspref 命名空间前缀的那个元素或其祖先。
你的情况
其中一个命名空间声明中存在拼写错误：
xmnls:spotify="https://www.spotify.com/ns/rss"
^^
应该是
xmlns:spotify="https://www.spotify.com/ns/rss"
^^
而且，是的，在解决了这样一个问题之后，其他人可能会被发现。
我正在尝试 self-publish 我的播客使用我自己编写的 RSS 提要。当我检查它是否在 https://validator.w3.org/feed/ 验证时，我一直在标题中收到错误，它说错误在第 2 行，即 RSS 标签本身。我一遍又一遍地检查代码并将其与有效的 RSS 提要进行比较，结果完全一样，所以我不知道问题出在哪里，w3 也没有给我任何修复方法的指示。这是我的代码：
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
xmlns:media="http://search.yahoo.com/mrss/"
xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
xmlns:dcterms="http://purl.org/dc/terms/"
xmnls:spotify="https://www.spotify.com/ns/rss"
xmlns:atom="http://www.w3.org/2005/Atom">
如果有人能告诉我我做错了什么以及如何解决它以便 feed 生效，我们将不胜感激。
编辑以包含完整代码：
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
xmlns:media="http://search.yahoo.com/mrss/"
xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
xmlns:dcterms="http://purl.org/dc/terms/"
xmnls:spotify="https://www.spotify.com/ns/rss"
xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<!-- Main Information -->
<Title>Entitled Gamers</Title>
<description>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</description>
<link>https://www.mobomu.com/podcasts/entitledgamers/entitledgamers.html</link>
<image>
<url>https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg</url>
</image>
<!-- Optional Information -->
<language>en-US</language>
<copyright>Copyright 2020, Mobomu Gaming Network</copyright>
<managingEditor>poopshizzle@mobomu.com</managingEditor>
<webMaster>herc@mobomu.com</webMaster>
<!-- iTunes Specifics -->
<itunes:author>Mobomu</itunes:author>
<itunes:owner>
<itunes:name>Mobomu</itunes:name>
<itunes:email>entitledgamers@mobomu.com</itunes:email>
</itunes:owner>
<itunes:image url="https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg"/>
<itunes:category text="Leisure">
<itunes:category text="Video Games" />
</itunes:category>
<itunes:category text="Comedy" />
<itunes:category text="News">
<itunes:category text="Entertainment News" />
</itunes:category>
<itunes:summary>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</itunes:summary>
<itunes:type>episodic</itunes:type>
<!-- Spotify Specifics -->
<spotify::countryOfOrigin>us</spotify::countryOfOrigin>
<!-- Episode 1 -->
<item>
<title>Games are Getting More Expensive?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitledgamers/audio/episode-001.mp3"
length="103132759" type="audio/mpeg"/>
<description>NBA 2K sparks the AAA game price hike conversation. Ninja streams to YouTube without a contract. And Destiny 2's Twitch plugin breaks site-wide subtrain records for big streamers.</description>
<guid>fd63b88b-2714-43c4-9840-d2dc247dda33</guid>
<pubDate>Sun, 12 Jul 2020 14:50:59 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>42:57</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>1</itunes:episode>
<itunes:season>1</itunes:season>
<itunes:explicit>no</itunes:explicit>
</item>
<!-- Episode 2 -->
<item>
<title>Are Gamers Tired of Battle Royales?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitlegamers/audio/episode-002.mp3"
length="96854827" type="audio.mpeg"/>
<description>Ubisoft's HyperScape is a new Battle Royale game that resurfaces the age-old "gamers are tired of this genre" conversation, but are they really?</description>
<guid>33bdc13a-8c1a-430e-a7c3-709b0d1928e4</guid>
<pubDate>Sun, 19 Jul 2020 17:00:00 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>40:21</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>2</itunes:episode>
<itunes:season>1</itunes:season>
<itunes:explicit>no</itunes:explicit>
</item>
</channel>
</rss>
编辑 2：感谢下面 kjhughes 的帮助，我能够解决我的 RSS 标签中的错误（这是一个打字错误），然后 w3 能够在我的代码中找到更多的错误，一旦他们都已修复，已验证。我将 post 经过验证的 RSS 提要代码供可能遇到类似问题的其他人参考：
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0"
xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<!-- Main Information -->
<title>Entitled Gamers</title>
<description>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</description>
<link>https://www.mobomu.com/podcasts/entitledgamers/entitledgamers.html</link>
<image>
<title>Entitled Gamers</title>
<link>https://www.mobomu.com/podcasts/entitledgamers/entitledgamers.html</link>
<url>https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg</url>
</image>
<atom:link href="https://www.mobomu.com/podcasts/entitledgamers/rss/feed.xml" rel="self" type="application/rss+xml" />
<!-- Optional Information -->
<language>en-US</language>
<copyright>Copyright 2020, Mobomu Gaming Network</copyright>
<managingEditor>poopshizzle@mobomu.com (PoopShizzle)</managingEditor>
<webMaster>herc@mobomu.com (SamuraiHerc)</webMaster>
<!-- iTunes Specifics -->
<itunes:author>Mobomu</itunes:author>
<itunes:owner>
<itunes:name>Mobomu</itunes:name>
<itunes:email>entitledgamers@mobomu.com</itunes:email>
</itunes:owner>
<itunes:image href="https://www.mobomu.com/podcasts/entitledgamers/img/cover.jpg"/>
<itunes:category text="Leisure">
<itunes:category text="Video Games" />
</itunes:category>
<itunes:category text="Comedy" />
<itunes:category text="News">
<itunes:category text="Entertainment News" />
</itunes:category>
<itunes:summary>Two friends and streamers SamuraiHerc and PoopShizzle get together once a week to chat about what's new and trending in gaming, streaming, and content creating.</itunes:summary>
<itunes:type>episodic</itunes:type>
<itunes:explicit>clean</itunes:explicit>
<!-- Episode 1 -->
<item>
<title>Games are Getting More Expensive?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitledgamers/audio/episode-001.mp3"
length="103132759" type="audio/mpeg"/>
<description>NBA 2K sparks the AAA game price hike conversation. Ninja streams to YouTube without a contract. And Destiny 2's Twitch plugin breaks site-wide subtrain records for big streamers.</description>
<guid isPermaLink="false">fd63b88b-2714-43c4-9840-d2dc247dda33</guid>
<pubDate>Sun, 12 Jul 2020 14:50:59 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>42:57</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>1</itunes:episode>
<itunes:season>1</itunes:season>
</item>
<!-- Episode 2 -->
<item>
<title>Are Gamers Tired of Battle Royales?</title>
<enclosure url="https://www.mobomu.com/podcasts/entitlegamers/audio/episode-002.mp3"
length="96854827" type="audio/mpeg"/>
<description>Ubisoft's HyperScape is a new Battle Royale game that resurfaces the age-old "gamers are tired of this genre" conversation, but are they really?</description>
<guid isPermaLink="false">33bdc13a-8c1a-430e-a7c3-709b0d1928e4</guid>
<pubDate>Sun, 19 Jul 2020 17:00:00 GMT</pubDate>
<!-- iTunes Specifics -->
<itunes:duration>40:21</itunes:duration>
<itunes:episodeType>full</itunes:episodeType>
<itunes:episode>2</itunes:episode>
<itunes:season>1</itunes:season>
</item>
</channel>
</rss>
一般
必须声明使用中的所有 XML 前缀命名空间。
具体来说，文档中每个 XML 元素名称的格式为，
nspref:LocalName
必须这样声明
xmlns:nspref="http://example.com/ns"
在 nspref 命名空间前缀的那个元素或其祖先。
你的情况
其中一个命名空间声明中存在拼写错误：
xmnls:spotify="https://www.spotify.com/ns/rss"
^^
应该是
xmlns:spotify="https://www.spotify.com/ns/rss"
^^
而且，是的，在解决了这样一个问题之后，其他人可能会被发现。