Tagging Links in PDFs

I am writing this post mostly to not lose this very useful piece of info that I read today.

I was working on remediating a PDF for a new client and there were several links that had been mismarked by the first person who had reviewed the PDF.

This article by Lynn Pacquin solved all my problems in about five minutes.

Her thoughts (copied and edited below)

To be accessible, each link in a PDF document must have three tags (in this order):

• a parent tag.
• a child tag.
• a child document content tag. 

The tag alerts a screen reader to the presence of the link. Acrobat tags each URL by adding a document content tag to the tag tree, but it does not also add a tag. A link that does not have a tag is considered an unmarked link and is inaccessible to assistive technology.

You must locate all instances of unmarked links in the tag tree, and then add tags to them, by following these instructions

1. In the Tags tab, choose Options & Highlight Content, and then choose Options & Find. 
2. In the ind Element dialog box, select Unmarked Links from the Find drop-down menu. 
3. Click Find. The first unmarked link is highlighted on the page. 
4. Close the Find dialog box. Use the select tool to select text that is near the link, then choose Options & Find Tag From Selection. 
5. In the Tags tab, select the document content tag for the link (the tag that names the URL), and then choose Options & New Tag. 
6. In the New Tag dialog box, select Link as the tag type and click OK. A tag appears below the selected document control tag. Drag the document content tag down to be the child of the tag. 
7. Select the tag, choose Options & Find, and then select Unmarked Links from the Find drop-down menu. 
8. Click Find. Acrobat finds the URL that you have been tagging. 
9. In the Find Element dialog box, click Tag Element. The following two things happen: - A tag appears as a child to the tag directly above the document content tag. The tagging for this link is complete. - Acrobat highlights the next unmarked link in the document. 
10. As needed, repeat steps 4 through 9 on the rest of the unmarked links in the document.