extLst: A CT_ExtensionList element, as specified in [ISO/IEC29500-4:2011] section A.2, that specifies future extensibility for this element.
Attributes:
name: An ST_Xstring attribute, as specified in [ISO/IEC29500-1:2011] section 22.9.2.19, that specifies the name of the Timeline view. This element MUST be a unique case-insensitive name within the scope of this workbook. The length of this attribute MUST be greater than or equal to one character and MUST be less than or equal to 32767 characters.
cache: An ST_Xstring attribute that specifies the name of the Timeline cache (section 2.3.5.1) that this Timeline view is associated with. There MUST be a CT_TimelineCacheDefinition element (section 2.6.112) within this workbook with the name attribute equal to the value of this attribute.
caption: An ST_Xstring attribute that specifies the caption of the Timeline view. If this string exists, the length MUST be greater than or equal to one character.
