The rolling out of PDF by Adobe has been proven one of the most important documents formats among the many. Not only it’s open to anyone, but it also accounts for several various items inside to enhance the experience. However, there are things in which PDF / A differs from PDF.
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References
- https://www.sciencedirect.com/science/article/pii/0360128585900024
- https://www.degruyter.com/document/doi/10.1515/9783112415467/html