This document obviously pre-dates PDF/A, but is still relevant. Scanning a
document would give you a "PDF Image Only" file, if you OCR it you can get a
"PDF Searchable Image Exact" file (that is an image with hidden text). The
PDF files we are all aware of are "PDF Normal" files (or "PDF Formatted Text
and Graphics") but you can't scan into this format.
There are PDF/A equivalents of each of the above formats.
-----Original Message-----
From: The UK Records Management mailing list
[mailto:[log in to unmask]]On Behalf Of Richard
Shakeshaft
Sent: 16 March 2008 15:48
To: [log in to unmask]
Subject: Re: To TIFF or not to TIFF
Adobe's explanation of these different types of
scanned PDFs can be found in
http://www.adobe.com/products/acrcapture/pdfs/aacflavors.pdf
which is an old manual, but I've yet to find
another official Adobe document describing the differences.
At 15:25 16/03/2008, you wrote:
><http://www.alliancegroup.co.uk/pdf.htm>PDF/A
>should certainly be looked at and may replace
>TIFF as the standard of choice for archiving.
>
>For scanned images though it doesn't offer
>storage space advantages over TIFF. In fact a
>typical scanned PDF/A document will be slightly
>larger than the equivalent TIFF. A scanned PDF
>(or PDF/A) document is basically a TIFF file inside a PDF wrapper.
>
>Similarly you don't get full text searching with
>scanned PDF/A documents, the scanned document is
>an image not text. You can, of course, use
>PDF/A Searchable files. This involves running
>OCR (Optical Character Recognition) software to
>read the text in the image and save it to the
>PDF/A file as a hidden text layer behind the
>image. This hidden text can then be searched and
>the scanned image displayed. Though there may be
>some OCR errors these are usually acceptable.
>The scanned image would be an exact
>representation of the original document, the
>OCRd text would not be displayed. (You can do
>exactly the same with TIFF files, and store the
>OCRd text as a TIFF Tag, however the lack of an
>agreed standard for this has limited its use).
>
>Alternatively it is possible to convert a
>scanned image to a PDF/A text file which would
>give the advantages of small size and full-text
>searchability. This would involve using OCR to
>replace the scanned image with text. The scanned
>image is not stored and so a lot of effort must
>be spent on proofreading and ensuring the text
>file is an exact representation of the original.
>Even then it may not be considered a 'true'
>representation of the original. Generally the
>time this takes (possibly several hours for each
>document) cannot be justified.
>
>If you are converting electronic documents (such
>as Word or Excel) to PDF/A these will give
>smaller files than if they had been printed and
>scanned back in, and they will be full-text searchable too.
>
>PDF/A is based on PDF release 1.4 (Acrobat 5)
>and can be viewed or searched by any software
>capable of viewing or searching PDF files.
>
>Steve Norris
>Alliance Group
><http://www.alliancegroup.co.uk>www.alliancegroup.co.uk
>
>
> -----Original Message-----
>From: The UK Records Management mailing list
>[mailto:[log in to unmask]]On
>Behalf Of Stephen Robert Macintosh
>Sent: 16 March 2008 05:18
>To: [log in to unmask]
>Subject: Re: To TIFF or not to TIFF
>
>I am surprised that no one in this string has
>mentioned PDFA. PDFA is associated with an ISO
>standard (19005) and is being widely adapted by
>a number of European agencies. It also seems to
>neatly address the storage space challenges
>associated with TIFF. Further information can be
>found at <http://www.pdfa.org/>www.pdfa.org ,
>which is the URL for the PDFA competency centre based in Berlin.
>Some advantages of a PDF/A archive over a TIFF archive are:
>ط Full-Text Search
>ط File Size
>ط Metadata
>ط Optimization
>Stephen Macintosh
>ماكينتوش ستيفن روبرت
>Specialist Recordkeeper
>Documentation and Information Section
>Dubai Municipality
>Ph 971508824677
>-----Original Message-----
>From: The UK Records Management mailing list
>[mailto:[log in to unmask]] On Behalf Of Sonya Sherman
>Sent: 15/03/2008 4:20 AM
>To: [log in to unmask]
>Subject: Re: To TIFF or not to TIFF
>Sorry, I should also have mentioned another very
>practical document (in a similar vein to PD0008)
>is Archives New Zealand's S6 Digitisation Standard.
>Which includes a handy checklist.
><http://www.archives.govt.nz/continuum/rkpublications.php>http://www.archiv
es.govt.nz/continuum/rkpublications.php
>
>regards
>Sonya
>"Shiel, Kathleen" <[log in to unmask]> wrote:
>Dear David and colleagues,
>Thank you all for your contributions to this
>thread, I do have a much clearer understanding
>of what it is that I'm trying to achieve and am
>starting some extra reading around various file
>format as well as audit processes.
>Our scenario is that we are preparing to
>digitise 75 year records, so we must ensure that
>they are legally admissible and contain
>evidential weight, but also ensure that the text
>is still searchable and that the record can still be accessed in 75 years.
>I feel a large strategy document coming on!
>Thank you all once again, I'll continue to watch for progress in this area.
>Regards,
>Kathy Shiel
>Records Manager (Modern Records)
>Woodhorn
>Northumberland Museum, Archives & Country Park
>QEII Country Park
>Ashington
>Northumberland
>NE63 9YF
>E-mail <mailto:[log in to unmask]>[log in to unmask]
>Tel : 01670 528026
>website - Woodhorn :
><http://www.experiencewoodhorn.com/>http://www.experiencewoodhorn.com
>website - Modern Records Service:
><http://www.northumberland.gov.uk/modernrecords>http://www.northumberland.g
ov.uk/modernrecords
>
>website - Northumberland County Council:
><http://www.northumberland.gov.uk/>http://www.northumberland.gov.uk
>
>Our mission - to provide Northumberland with a
>world class visitor attraction and research destination.
>"Whatever the cost of our libraries, the price
>is cheap compared to that of an ignorant
>nation". (This quotation is attributed to Walter Cronkite)
>----------
>From: The UK Records Management mailing list
>[mailto:[log in to unmask]] On Behalf Of David Thomas
>Sent: 13 March 2008 22:49
>To: [log in to unmask]
>Subject: Re: To TIFF or not to TIFF
>This is slightly off-topic, but interesting.
>TIFF files have the disadvantage of being quite
>large and this can add significantly to the cost
>of storage, particularly when large volumes of
>material are being digitsed. The National
>Archives is working with Glasgow University and
>other experts to see if we can identify other
>storage formats (eg JPEG 2000 or PNG) which
>would offer similar image preservation qualities
>to TIFF but would be smaller and hence cheaper
>to store. We hope to produce a draft document
>for consultation later in the year.
>----- Original Message -----
>From: <mailto:[log in to unmask]>Tinsley, Chris
>To:
><mailto:[log in to unmask]>RECORDS-MANAGEMENT-UK@JISCMAIL
.AC.UK
>
>Sent: Thursday, March 13, 2008 7:40 AM
>Subject: Re: To TIFF or not to TIFF
>To paraphrase something else, its not the format
>its what you do with it. Provided you can show
>that a TIF file has been handled in a way that
>makes tampering, changing , deleting and other
>forms of altering unlikely the it should pass
>the BIP0008 test,its not about the format. DOC
>files, excel files, RFT files are all easy to
>alter but will pass BIP0008 if processed properly.
>
>In the end its about choosing the right format
>for the images then putting the right procedures around them.
>Chris
>
>-----Original Message-----
>From: The UK Records Management mailing list on behalf of Shiel, Kathleen
>Sent: Wed 12/03/2008 16:46
>To: [log in to unmask]
>Subject: To TIFF or not to TIFF
>Hello everyone,
>I have a digital record question for you. Is the TIF format a 'legally
>admissible' format. In other words does it comply with PD 0008 'Legal
>admissibility and evidential weight of information stored
>electronically'?
>Kind regards,
>Kathy Shiel
>Records Manager (Modern Records)
>Woodhorn
>Northumberland Museum, Archives & Country Park
>QEII Country Park
>Ashington
>Northumberland
>NE63 9YF
>E-mail [log in to unmask]
><<mailto:[log in to unmask]>mailto:[log in to unmask]>
>Tel : 01670 528026
>website - Woodhorn :
><http://www.experiencewoodhorn.com/>http://www.experiencewoodhorn.com
><http://www.experiencewoodhorn.com/>
>website - Modern Records Service:
><http://www.northumberland.gov.uk/modernrecords>http://www.northumberland.g
ov.uk/modernrecords
>
>website - Northumberland County Council:
><http://www.northumberland.gov.uk/>http://www.northumberland.gov.uk
><http://www.northumberland.gov.uk/>
>Our mission - to provide Northumberland with a world class visitor
>attraction and research destination.
>"Whatever the cost of our libraries, the price is cheap compared to that
>of an ignorant nation". (This quotation is attributed to Walter
>Cronkite)
>
>
>
>
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