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Annotation of 43BSDTahoe/new/xns/man/Viewpointfiles.n, revision 1.1

1.1     ! root        1: .TH "Viewpointfiles" 5 "16-Feb-87" "Xerox (WRC)"
        !             2: .\" $Header: Viewpointfiles.n,v 1.1 87/04/01 13:55:09 ed Exp $
        !             3: .SH NAME
        !             4: Viewpoint files - format of Viewpoint files as stored on Unix
        !             5: .SH DESCRIPTION
        !             6: Viewpoint  related files may be stored on a Unix system through retrieval
        !             7: from an NS file server via \fIxnsftp\fR or storage to the Unix file services
        !             8: \fIFiling4d\fR, \fIFiling5d\fR, \fIFiling6d\fR or \fIFilingSubset1d\fR. 
        !             9: Viewpoint files actually consist of two critical parts, attributes and content.
        !            10: To maintain the ability to use these files within Viewpoint, both parts must be
        !            11: retained on the Unix file system. Currently that is done in one of several ways 
        !            12: depending upon the file \fItype\fR and \fIisDirectory\fR attributes.
        !            13: .PP
        !            14: A certain class of files are generally transferred for content only. The file
        !            15: types \fItDirectory\fR, \fItText\fR, \fIInterpress\fR and \fIViewpoint
        !            16: Canvases (RES)\fR are retained as \(n'content-only\(n' files; the only attributes
        !            17: maintained are those which can be saved in or implied from the file structure
        !            18: itself
        !            19: (\fIcreatedOn\fR, \fIdataSize\fR, \fIisDirectory\fR, \fImodifiedOn\fR, \fIname\fR,
        !            20: \fIpathname\fR, \fItype\fR and \fIversion\fR).
        !            21: .PP
        !            22: The remainder of file types are stored on the Unix system with both attributes
        !            23: and content in a single file. Files of this type are specific to Xerox
        !            24: applications, such as Viewpoint, network services, 860, etc.. 
        !            25: Examples of these files are Viewpoint 
        !            26: documents, books, spreadsheets, applications, 860 documents and printer fonts.
        !            27: .PP
        !            28: These files are retained on Unix in a file having the following format: a header
        !            29: \*(lqviewpoint-files/xerox\*(rq followed by a Cardinal (16 bits) containing 
        !            30: the size in bytes of the maintained attributes, a Sequence of Attributes which
        !            31: contains the relevant file attributes followed by the file content.
        !            32: The Unix tools will determine the file type by looking through the attribute 
        !            33: sequence for the \fItype\fR attribute.
        !            34: .PP
        !            35: Some of the above file types are in fact \(n'directories\(n' of other files which are
        !            36: treated as a single entity; in this case, the \fIisDirectory\fR attribute is
        !            37: TRUE. For these files, the \fISerialize\fR/\fIDeserialize\fR procedures are used and the file
        !            38: content saved is the actual serialized stream of file and descendant's attributes
        !            39: and content.    
        !            40: .SH NOTES
        !            41: The scheme is obviously not foolproof but provides a simple mechanism to deal
        !            42: with the files deemed most useful to casual users of the tools. No attempt has
        !            43: been made to provide a \(n'full\(n' file service since there are cases where only the 
        !            44: file content is desired to provide interchangability with Unix tools.
        !            45: .PP
        !            46: Although this scheme allows a large set of attributes to be retained with the
        !            47: file, not all of these attributes may be available and/or returned to 
        !            48: interested clients.
        !            49: .SH "SEE ALSO"
        !            50: xnsftp(1N), Filing4d(1N), Filing5d(1N), Filing6d(1N), FilingSubset1d(1N)
        !            51: .br
        !            52: Filing Protocol, \s8XSIS\s0 108605 (May 1986)
        !            53: .SH AUTHORS
        !            54: Ed Flint

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