Architecture edit The Apache POl project contains the following subcomponents meaning of acronyms is taken from old documentation POIFS Poor Obfuscation Implementation File System This component reads and writes Microsoft's OLE 2 Compound document format Since all Microsoft Office files are OLE 2 files this component is the basic building block of all the other POl elements POIFS can therefore be used to read a wider variety of files beyond those whose explicit decoders are already written in POl HSSF Horrible SpreadSheet Format- reads and writes Microsoft Excel XLS format files It can read files written by Excel 97 onwards this file format is known as the BIFF 8 format As the Excel file format is complex and contains a number of tricky characteristics some of the more advanced features cannot be read ·XSSF XML Spreadsheet Format-reads and writes Office Open XML XLSX format files Similar feature set to HSSF but for Office Open XML files HPSF Horrible Property Set Format reads Document Summary information from Microsoft Office files This is essentially the information that one can see by using the FilelProperties menu item within an Office application ·HWPF Horrible Word Processor Format-aims to read and write Microsoft Word 97 DOC format files This component is in initial stages of development ·XWPF XML Word Processor Format _ similar feature set to HWPF but for Office Open XML files HSLF Horrible Slide Layout Format a pure Java implementation for Microsoft PowerPoint files This provides the ability to read create and edit presentations though some things are easier to do than others HDGF Horrible DiaGram Format - an initial pure Java implementation for Microsoft Visio binary files It provides an ability to read the low level contents of the files HPBF Horrible PuBlisher Format - a pure Java implementation for Microsoft Publisher files ·HSMF Horrible Stupid Mail FormatPlbetter source needed-a pure Java implementation for Microsoft Outlook MSG files DDF Dreadful Drawing Format -a package for decoding the Microsoft Office Drawing format Apache POI was Created Solely To Throw Shade at Microsoft Change My Mind Meme
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