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  </implementation>

• Add XLSX export entry point in oox\source\xls\excelfilter.cxx

In fact ExcelFilter is only a entry point of XLSX export, it isn't responsible for real export but will delegate to other object in sc module. In fact, in AOO code, real OOXML export is owned by each individual application, say sc, sd, sw. Usually export filters in application layer are located in the same folder as binary filters and use similar logic.

For example, in sc\source\filter\excel\xestream.cxx there are two classes, XclExpStream and XclExpXmlStream. XclExpStream is responsible exporting binary files, XclExpXmlStream is responsible for exporting OOXML files. Similar as binary filter, OOXML filters also export elements from parent to child and usually XclExpXmlXXX classes are OOXML specific and they have a SaveXml method for exporting their data. However, some classes are shared by both binary and OOXML filter. In this case, a Save method is for exporting binary data, a SaveXml method is for export OOXML data.