I am looking through the options to tag an ID documento so that it gets exported into PDF —PDF/A-2a to be precise— in the most convenient and accesible way with the help of Acrobat Pro (XI). I see that I can tag things in three ways:
- With XML tags with the "tags" palette.
- With articles with the "articles" palette.
- Assigning PDF tags in the "Paragraph Style" palette.
My doubts are:
- Do I need to use the three ways? I have seen that with simple InDesign documents I manage to get a valid PDF/A-2a and with a little tweak it passes the needed 508 accesibility test.
- Is any of the three ways 'superior' to the other?
- Is any one of them superseded by another?
- Am I completely lost and I don't need any of this stuff to get a PDF/A-2a or an accesible PDF? (BTW, no, I am not mistakingly taking PDF/A-2a for a wholly accesible PDF, that's another tale 
).
Thanks in advance.
Gustavo (Posting from a rainy Madrid)