Material package accessible teaching: Lista: PDF accessibility (checklist)

... does not consist of an image file. (à otherwise convert to PDF using OCR technology! Attention: this means a lot of work. The PDF should not be an image or scan from the outset).
... contains headings that were previously created as such using style sheets.
... only contains lists, tables and other forms of content if they are labelled as such using style sheets.
... contains tags (à Tags are markings of elements in the document. These tags are usually created automatically if the previous document was correctly designed and saved).
... only contains images if they have an alternative text or are labelled as decorative. (Marking as decorative is optional, but should be avoided if possible; images should ideally have an alternative text within the PDF).
... has a title and an author. These are in the metadata of the PDF.
... has no frame around text elements. This applies in particular when creating PDFs with PowerPoint, as text with a frame is converted into an image when it is converted into a PDF.
... has been checked for accessibility. (à Adobe Acrobat Pro, PAC 3)