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Adds a new raw tag.
Typically you would use this for inserting point based content
using the MP and DP operators.
These operators are PDF content stream commands that mark a
single point with a tag identifier. MP simply applies a tag, while
DP additionally attaches a property list dictionary for storing
associated data or metadata. They are used for marking specific
locations within page content for accessibility or
application-specific purposes.
Before adding Commit is called then
the value specified is inserted directly into the content stream.
There is no vetting of the tag so you need to ensure that the value
is of a type which will make sense in the content stream.
To ensure that the tag does not interfere with other content it
will be preceded by a space and a carriage return linefeed
combination will be added after it. If the tag needs closing it is
your responsibility to close the tag with a matching call on the
same page.
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