FEED Validator

for Atom and RSS and KML

Sorry

This feed does not validate.

line 9, column 6: Undefined item element: g:title (2 occurrences) [help]

      <g:title>Mastering SEO</g:title>
      ^

line 10, column 6: Undefined item element: g:description (2 occurrences) [help]
```
      <g:description></g:description>
      ^
```

line 12, column 6: Undefined item element: g:link (2 occurrences) [help]

      <g:link>https://seogems.bigcartel.com/product/mastering-seo</g:link>
      ^

line 14, column 6: Undefined item element: g:additional_image_link (2 occurrences) [help]

      <g:additional_image_link></g:additional_image_link>
      ^

line 15, column 6: Undefined item element: g:mpn (2 occurrences) [help]
```
      <g:mpn>108890547</g:mpn>
      ^
```

line 17, column 6: Undefined item element: g:availability (2 occurrences) [help]

      <g:availability>in stock</g:availability>
      ^

line 18, column 4: item must contain either title or description (2 occurrences) [help]
```
    </item>
    ^
```

line 25, column 21: g:image_link must be a full and valid URL: [help]

      <g:image_link/>
                     ^

In addition, interoperability with the widest range of feed readers could be improved by implementing the following recommendations.

line 18, column 4: item should contain a guid element (2 occurrences) [help]
```
    </item>
    ^
```
line 31, column 2: Missing atom:link with rel="self" [help]
```
  </channel>
  ^
```