This simple type specifies the orientation of all pages in the parent section. This information is used to determine the actual paper size to use when printing the file.
Specifies that pages in this section shall be printed in landscape mode, which prints the page contents with a 90 degree rotation with respect to the normal page orientation.
ReadonlyPORTRAIT: "portrait"
Portrait Mode
Specifies that pages in this section shall be printed in portrait mode.
This simple type specifies the orientation of all pages in the parent section. This information is used to determine the actual paper size to use when printing the file.
Reference: https://c-rex.net/samples/ooxml/e1/Part4/OOXML_P4_DOCX_ST_PageOrientation_topic_ID0EKBK3.html
XSD Schema