Im a bit unsure what the first question is, but for the second question: I blieve you should just set them. Twitter:card if for a special embed as far as I recall ,where you can define how the OG data is presented
clever nest
Im a bit unsure what the first question is, but for the second question: I blieve you should just set them. Twitter:card if for a special embed as far as I recall ,where you can define how the OG data is presented
for 2nd question: twitter:title is great if you want to make sure your content looks perfect on twitter. Imagine twitter takes 140 character and facebook only 100 characters.. then FB limits your Twitter. Thats why "Twitter:title".
I have never used namespace/prefix sorry.