2.1.1540 Part 4 Section 184.108.40.206, period (Period)
a. The standard implies that the val attribute is optional.
Office requires this attribute.
b. The standard states that this element is ignored for non-moving average trendlines.
Office requires this element to be included when the val attribute of trendlineType equals movingAvg and not otherwise.
c. The standard states that the val attribute has a maximum value of less than or equal to 255.
Office requires that the upper bound of @val is the number of categories on the series minus 1. If the @val is greater than the number of categories minus 1 but less than 256 the file loads and saves correctly but the trendline will not be displayed
d. The standard states that the val attribute has a maximum value of less than or equal to 255.
Office can save files with attribute val greater than 255 when the number of categories for the chart is greater than 256, but Office will fail to load these files.
This note applies to the following products: 2007, 2007 SP1, 2007 SP2.