Do you get mcn-l? Did you catch this thread? If not I saved some of the posts.
BP -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Tuesday, 14 February 2006 11:07 AM To: Multiple recipients of mcn-l Subject: RE: Embedding metadata into digital images and Vendors for Archiving Hi folks, I don't recall technical or administrative metadata being part of Perian's original question, but since it came up: when we surveyed about 100 cultural heritage institutions a couple of years back about how they'd like to capture their technical metadata, most wanted their cake and eat it, too - meaning they wanted it stored within the file itself, but in a format from which they could export the information into a database. In the course of the Automatic Exposure initiative, we've amassed quite some information about the different options for storing technical metadata in digital files, as well what kinds of metadata you can already expect to find their courtesy of TIFF and EXIF. Just to shed a little more light on what Adobe XMP (and by extension, any Adobe program) is doing: it extracts all the technical metadata it can find in the file headers (tiff or exif tags), and then writes it into the file as an XMP package. The data you see in PhotoShops FileInfo is the data from that XMP package. Anybody can extend the data which can be put into a file by writing a so-called XMP panel defining new fields, and then use these fields for data capture. At RLG, we're hoping to produce an XMP panel for NISO Z39.87 Technical Metadata for Digital Still Images once it's been through the standardization process. The idea is that just as you can download an IPTC panel now and use it, you could download the Z39.87 panel and use it to more effectively capture technical metadata. For more info on all of this, see http://www.rlg.org/en/page.php?Page_ID=2681 Cheers, Günter *** Günter Waibel Program Officer/RLG 2029 Stierlin Court, Suite 100, Mountain View, CA 94043 USA voice: +1-650-691-2304 | fax: +1-650-964-1461 blog: www.hangingtogether.org [email protected] John_Poirier@gov. nt.ca Sent by: To [email protected] Multiple recipients of mcn-l trope.com <[email protected]> cc 02/10/2006 03:42 Subject PM RE: Embedding metadata into digital images and Vendors for Archiving Please respond to [email protected] trope.com Hi. You may want to consider the IPTC (International Press Telecommunications Council) standard, at least for descriptive metadata. It is compatible with the "File Info" function in Photoshop. In my experience IPTC has more potential than "File Info" for high productivity in terms of batch data entry via an IPTC editor. IPTC editing capabilities have become increasingly common in off-the-shelf image management software such as Canto Cumulus, Extensis Portfolio and IMatch. Some packages enable you to import information from databases into image files in IPTC format, and/or to export embedded IPTC information to databases. For technical metadata you may be able to adapt the EXIF standard. I do know that EXIF editors exist, but have not researched the extent of their capabilities. If you work within those standards, incompatibility with imaging software as mentioned below should not be an issue. This website is a good starting point: www.controlledvocabulary.com Hope you find this useful. John Poirier Coordinator of Technical Services Northwest Territories Archives Yellowknife, NWT, Canada 867-920-8842 -----Original Message----- From: trudy /unix [mailto:[email protected]] Sent: Wednesday, February 01, 2006 1:07 PM To: mcn-l /unix Subject: Re: Embedding metadata into digital images and Vendors for Archiving Gunther and Perian - To give you an idea of some "problems." Right now I am managing a scanning project for 19 California libraries whose images will reside in a digital repository of the California Digital Library. We are embedding tech metadata for preservation purposes: hardware used, vendor, owner(library), and a short descriptive field. We had hoped to also include color information, but have opted to scan a target with each object. We are using jHOVE to validate the Tiff format, including the tiff header format. Initially if rejected several image files, (50%) as did Adobe's program Elements. The problem, as we determined it, was that when the vendor used Adobe programs to process the files, they interjected their own header information in such a manner as to "corrupt" the files. This was a problem also noted by Northwestern University Library. Removal of all header information that was not explicitly requested solved the problem. The Vendor is batch loading the metadata from a spreadsheet that the libraries' provide. They will be "correcting" one batch, a library added a column for their own purposes which through everything off, but they will be doing it by simply overwriting the existing. I believe maintaining the tech and some administrative metadata with the file has a lot to say for maintaining the integrity of the image file, but second Guenther's concern that storing all the descriptive metadata with file may not be wise for the reasons that he lists. Also for those looking for a vendor, we competitively bid this project (using RLG's great template for an RFP) and have been very happy with both the process, service and product that we have received from the winner, Northern Micrographics/Brookhaven Bindery 2004 Kramer Street La Crosse, WI 54603 Phone: 800-236-0850 ext. 107 Fax: 608-781-3883 [email protected] http://www.normicro.com If anyone requires more information, I will be glad to correspond with them privately. Trudy On 2/1/06 8:54 AM, "[email protected]" <[email protected]> wrote: > Hi Perian, > > I'd be curious to hear what mechanism you'll use for embedding descriptive > metadata into the image files - it has been an idea often pondered and > rarely implemented, as far as I know, but I'd be happy to stand corrected > by others who have pulled it off. > > There are various technical challenges in embedding the metadata (where > does the metadata sit within the file?), and various challenges of > procedure and maintenance (e.g. scalability - how do you get descriptive > records into huge numbers of files automatically; how does the data get > updated if it changes?). In theory, you could use Adobe XMP to embed any > type of metadata into a digital file, including descriptive metadata, but > at the end of the day, the logistics of getting the data in and keeping it > up to date may outweigh the obvious benefit of having such a tight link > between file and description. Maybe embedding a unique identifier within > the file which can be resolved in your database of record (your Collections > Management System, for example) makes more sense. I'd be curious to hear > from others how they maintain the link between image file and descriptive > metadata - I suspect the identifier route, often via the filename (i.e. the > unique id is in the filename), is what most people these days practice. > > As for mixing different descriptive approaches: if your goal is to have > these digitized images searchable from within one interface, you'll > eventually have to find a common denominator among different descriptions. > If you're starting from scratch in describing them, it would seem > worthwhile to consider whether you can achieve adequate description using > just one descriptive approach. If not, you'd really want to keep in mind > that these different descriptions will have to map to one another down the > road. > > Cheers, > > Günter > > *** > > Günter Waibel > Program Officer/RLG > 2029 Stierlin Court, Suite 100, Mountain View, CA 94043 USA > voice: +1-650-691-2304 | fax: +1-650-964-1461 > blog: www.hangingtogether.org > [email protected] > > > > <[email protected] > g> > To > 01/27/2006 03:32 [email protected] > PM cc > > Subject > Please respond to Embedding metadata into digital > [email protected] images - which schema? > > > > > > > > > > > Hi again: > > > As I've mentioned before, I'm working on drafting our digitization > procedures here at the Judah L. Magnes Museum, a Jewish cultural history & > art museum. I'm trying to determine the best metadata schema to embed in > the digital images. I'm curious as to what, if any, schema other cultural > history & art organizations use (although we do also have some > archeological and archival objects in the collection) in their images. > > > For a mixed collection such as this, is it a good idea to mix schema? I > would like to use MARC for the archival objects that are mixed in (as our > archive center is already using MARC for everything), but I might end up > using Dublin Core or SPECTRA (or whatever) for the other stuff. Or is it > wiser to just pick one and "make it fit" as best I can? > > > Thanks, by the way, for all of your help earlier regarding your digitzation > procedures - your helpful links have caused my collection of useful guides > to grow considerably. > > > Perian Sully > Collection Database & Records Administrator Judah L. Magnes Museum > 2911 Russell St. > Berkeley, CA 94705 > > > --- > You are currently subscribed to mcn_mcn-l as: [email protected] > To unsubscribe send a blank email to > [email protected] > > > > > > > --- > You are currently subscribed to mcn_mcn-l as: [email protected] > To unsubscribe send a blank email to > [email protected] > --- You are currently subscribed to mcn_mcn-l as: [email protected] To unsubscribe send a blank email to [email protected] You are currently subscribed to MCN-L, the listserv of the Museum Computer Network (www.mcn.edu). To post messages to this list, send emails to: [email protected] To unsubscribe from this list, please send an email to [email protected] with any message. If you are receiving messages as they are posted and wish to change to daily digest format, send an email to [email protected] with "SET mcn-l DIGEST" in the BODY of the message. 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