Data Package: Reference CommonMark (#1067)

Author: nichtich

content/docs/standard/data-package.mdx

@@ -193,7 +193,7 @@ A `string` providing a title or one sentence description for this package
 
 ### `description`
 
-A description of the package. The description `MUST` be [markdown](http://commonmark.org/) formatted -- this also allows for simple plain text as plain text is itself valid markdown. The first paragraph (up to the first double line break) `SHOULD` be usable as summary information for the package.
+A description of the package in [CommonMark Markdown](https://spec.commonmark.org/current/) syntax. As any sequence of characters is a valid CommonMark document, this allows for simple plain text. The first paragraph `SHOULD` be separated by a blank line from following content to be usable as summary information of the package.
 
 ### `homepage`