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Version 1.0.0\
1.dowload file\
2.Browse dowloaded file & reposition them \
3.category for file browser and dowload(Data collection)\
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Data model\
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1.Leave\
Name :title of this book\
Author\
Image:image of this book\
Summary\
Url:where this book sits\
FileName\
\
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2.Branch\
Classification of books\
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3.Tree}