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9
Tagged Adobe PDF, Read Order, and Reflow
The logical structure tree of a Tagged Adobe PDF begins with a root level, or Tags
Root, followed by the highest level of element as its immediate child, which is
generally a container element representing the entire document or a section of the
document. Elements are nested in hierarchical order.
An element which has one or more elements nested beneath it is called a parent
element, and the nested elements are its children. Child elements on the same
level under a parent element are referred to as "siblings."
It is important to note that some attributes of a parent element are inherited by
its children (such as language). Also, if a parent element is moved or deleted, all
of its children will be moved or deleted as well.
A plus sign next to an elements in the logical structure tree indicates that the
element has children that are currently hidden. Clicking the plus sign will display
all of the children on the next level. Child elements may also have children, which
will be indicated by a plus sign. It is always good to open all of the child level
elements before changing properties or deleting an element to see what other
lower level child elements may be affected by any changes.
Structural element tags displayed as a hierarchical logical structure tree
in the Tags palette of Acrobat 5.0
About Artifacts
A page element that is not an intrinsic part of the document is called an artifact.
Artifacts can be any of the following:
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