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So we have two ways to enable these code correspondingly. For case 1, just add entry so that can activate ooxml filter and call them; for case 2, enable compiling for the source file in makefile. But due to those source files which has never been compiled was contributed earlier so that are not based on the current code base, they probably meet many compile errors which need to be fixed. Of course it is not so easy as just doing above things to enable ooxml export because the existing code are far away FAR FAR AWAY from product, have big gaps. They have many mistakes and misses which need to improve.
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