compression
| readonly attribute unsigned short
| The type of compression used for the item. The possible values and their meanings are defined in the zip file specification at http://www.pkware.com/business_and_developers/developer/appnote/
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size
| readonly attribute unsigned long
| The compressed size of the data in the item.
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realSize
| readonly attribute unsigned long
| The uncompressed size of the data in the item.
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CRC32
| readonly attribute unsigned long
| The CRC-32 hash of the file in the entry.
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isDirectory
| readonly attribute boolean
| True if the name of the entry ends with '/' and false otherwise.
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lastModifiedTime
| readonly attribute PRTime
| The time at which this item was last modified.
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isSynthetic
| readonly attribute boolean
| Use this attribute to determine whether this item is an actual zip entry or is one synthesized for part of a real entry's path. A synthesized entry represents a directory within the zip file which has no corresponding entry within the zip file. For example, the entry for the directory foo/ in a zip containing exactly one entry for foo/bar.txt is synthetic. If the zip file contains an actual entry for a directory, this attribute will be false for the nsIZipEntry for that directory. It is impossible for a file to be synthetic.
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