nfoWorks: tools for document interoperability

d140502 nfoWorks devNote
 Annotating XML Documents
Provenance & Authentication

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0.00 2017-06-14 20:22


{Ed.Note: This is boilerplate as a placeholder, allowing this page to be linked to before its content is perfected.

  The following topics are discussed:

   1.  The idea of provenance and authentication, when it might be important
   2.  The preservation of the derivation process at a level where it can be replicated.
   3.  Use of digital signatures for authentication of intermediates and the results.
   4.  External signatures and their confirmation - providing information by which users can conduct verification.
   5.  The embedded counterpart. 
   6.  Application-provided signature support (the Excel case).
   7.  Difference between authentication of the replica and authentication of the replicas fidelity.}

The derivation of an HTML rendition of an XML document is complicated by the fact that the XML document has characters with special significance in HTML.  In addition, HTML does not preserve whitespace as written in the XML document.  It is necessary to make adjustments for preserving spaces and line breaks and also "escape" XML document characters "&", "<", and ">" so they appear literally without recognition as HTML-significant special codes.

It is also a bit complicated to convert the plaintext line-number fields to  HTML fields that render as permalinks having the line number as text. 

The entire process can be accomplished with scripts and small programs, as is also the case for creation of a baseline plaintext replica.   All of the steps can be automated.  Here, a manual procedure is used to demonstrate "by hand" what the critical steps are for any automation.

The procedure given here is a continuation of the manual procedure already-provided for creating baseline plaintext replicasThe same XML document is used by way of example [n140504b3]..The examples begin with the Microsoft Office 2013 Excel spreadsheet that is a by-product of the plaintext replica procedure [n140504d2].

The objective is simple: Provide an HTML text that renders the same as the plaintext rendition (e.g., [n140504d1]), but with the line-number fields replaced by permalinks to those very lines.   Any further annotation is accomplished by editing the baseline HTML replica using appropriate tools.

This procedure illustrates two variations for HTML.  The simplest is a version that is preformatted and must be included in HTML <pre> elements in order to present with the original whitespace, including line breaks, as illustrated by [n140504d5].  The second is a version that is ordinary HTML for inclusion in HTML <p> (and equivalent) elements, with space and line breaks preserved using special HTML markup, as illustrated by [n140504d6].

1. Prerequisites
2. The Starting Point

9. References

1. Prerequisites

{Ed.Note: The list of sections will be quite different.  The general presentation on authentication is in 3-part cases, with verification first, then what the signature looks like, and finally what the procedure for creating it is.  There needs to be some cross-referencing, but it might not be available just yet.  This is clearly a topic that deserves coverage in TROSTing.}


  
{Ed.Note: For the authentication visuals, I want before and after illustrations, where possible.  It might be illustrated with snippets or with screen captures, with the transformation step in the middle.}
   

9. References

{Ed.Note: These will be pruned and the actual variant referenced, along with the resources used and where their specifications/documentation is found.}

[n140504d6]
Hamilton, Dennis E.  OpenDocument v1.2 Manifest Schema baseline ordinary HTML replica.  Derived from [n140504d4] on 2014-05-14.  This version results from all of the steps in the procedure here, having the original white-space preserved in ordinary HTML via presence of  &nbsp; character entities and <br /> line-break elements.
   

Attribution:
Hamilton, Dennis E.
Annotating XML Documents: Provenance & Authenticity.  nfoWorks devNote page d140502g 0.00, June 7, 2014.  Accessed at <http://nfoWorks.org/dev/2014/05/d140502g.htm>.
Revision History:
0.00 2014-06-07-09:11 Initial Placeholder
Provide initial placeholder content for illustrated embellishing that is carried out in the case of a specific schema. 

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created 2014-06-07-09:11-0700 (pdt)
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$$Date: 17-06-14 20:22 $
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