What sets an extracted glyph apart from ordinary visible page text.
[Flags]
public enum TextGlyphFlags
ISO 32000-2 §9.3.6, §8.11.3.1, §14.8.2.2 and §14.9.4.
kind:method, kind:property, kind:ctor. Press Esc to clear.ActualTextThe glyph is inside a marked-content sequence, or under a structure element, whose ActualText replaces its text: the first glyph of the sequence or element carries the replacement text and the others carry none, while every glyph keeps its own position. For an element whose content spans pages, that first glyph is its first in logical order, wherever its content starts; on its other pages every glyph of the element carries none.AlternateDescriptionThe glyph is under a structure element whose alternate description (Alt) replaces its text, as a whole word or phrase (ApplyAlternateDescriptions): the element's first glyph carries the description and the others carry none, on later pages too when its content spans pages.ArtifactThe glyph is an artifact: pagination, layout or background content, not the document's real content. It is inside a marked-content sequence tagged Artifact, or, on a tagged page read in structure order, under an Artifact structure element or not in the structure tree. Artifacts are extracted only when IncludeArtifacts asks for them.ExpansionThe glyph is under a structure element whose expansion (E) replaces its text, as a whole word (ApplyExpansions): the element's first glyph carries the expansion and the others carry none, on later pages too when its content spans pages.HiddenOptional content hides the glyph. Hidden glyphs are extracted only when IncludeHiddenContent asks for them.InvisibleThe glyph paints nothing: text rendering mode 3 (neither fill nor stroke) or 7 (clip only). Such text is often an OCR layer laid over a scanned image, so it is extracted.NoneVisible page text.