[ms-xlsx]: Excel (. xlsx) Extensions to the Office Open xml spreadsheetml file Format

lineWeight: A double attribute that specifies the line weight for each sparkline in the sparkline group, where the line weight is measured in points. MUST be greater than or equal to zero, and MUST be less than or equal to 1584.

type: An ST_SparklineType attribute (section 2.7.5) that specifies the type of the sparkline group.

dateAxis: A Boolean ([XMLSCHEMA2] section 3.2.2) attribute that specifies whether this sparkline group uses a date axis.

Value of dateAxis	Meaning
"false"	No date axis is specified for this sparkline group.
"true"	A date axis is specified for this sparkline group.

displayEmptyCellsAs: An ST_DispBlanksAs attribute (section 2.7.3) that specifies how empty cells are plotted.

markers: A Boolean ([XMLSCHEMA2] section 3.2.2) attribute that specifies whether data markers are displayed for each sparkline in this sparkline group.