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This model thus provides a useful base for vendors and users alike . The Company 's gross profit as a percentage of net sales may vary on a quarterly basis based upon vendor support programs , including inventory price protection policies , product mix , pricing strategies , market conditions and other factors . The Company 's gross profit as a percentage of net sales may vary on a quarterly basis based upon vendor support programs , product mix , pricing strategies , market conditions and other factors . A vendor technology neutral format with a wide base of vendor implementations , therefore , would support Web sites , HTML pages , and associated metadata independence across multiple technology platforms and applications over time . PMML by KXEN is further proof of the ever-broadening base of vendors who recognize the importance of open standards and who are willing to make their offerings conform to this specific , emerging standard . The goal of this tree is to form a stable base for vendors / distributors to use for their kernels .