Sigfrid Lundberg's Stuff
2011-09-16: Costs and benefits of standards
The Library communities have been more prone to accept and create
standards than most other communities. Here I try to list costs and benifits
for this.
Metadata,
Metadata processing,
The Library, 2011
2010-02-21: The proliferation of redundant meaning
I first used the term semantic drift about 10 years ago. It was a
real danger then, it still is but the proliferation of synonymous
vocabularies is worse still.
Internet,
Metadata, 2010
2009-12-01: Fifteen polar bears and one architecture
Today I gave a presentation on our metadata work. My experience of
that turned out to be about images.
Metadata, 2009
2009-08-24: Five years that formed the digital library as we know it:
1997-2001
It appeared to me that many the standards and technologies
underpinning the digital library as we know it were formed during five years
around the turn of the century.
Metadata, 2009
2009-07-21: The description and encoding of structure
Much metadata is fairly stright forward. A book does have a title
and an author. That's usually no big deal. We've been able to handle that
for centuries. A digital book has chapters, and everything you might want to
know may be in chapter two on page seventyfive. Or someone may tell you the
solution to your problems after a quarter of an hour in some video on
YouTube. Now, how do we cope with this?
Structural web design,
Metadata, 2009
2009-06-27: My first serious experience with ATOM
You don't really understand a document format until you've manually
encoded some documents, and written the software to parse and use it for
something useful. This somewhat refurbished version of my web site is to a
large extent built upon the ATOM syndication format, and here I discuss my
experience.
Structural web design,
Metadata, 2009
2002: The Metadata model in Scripta Academica Lundensis
This document specifies the metadata once used in the Lund university
dissertation database.
Digital collections,
XML processing,
Metadata, 2002
2002: S:t Laurentius Digital Manuscript Library: An excursion along the
border between resource discovery and resource description
This note has three aims. First it discusses the experiences
gained by the development of a specific service, which, using a collection
of detailed XML descriptions, provides its users access to a collection
of digitized medieval manuscripts. Secondly, it discusses the database
used from the point of view of both retrieval of the intellectual content
(the texts) of these manuscripts and of the retrieval of the manuscripts
as unique entities. Finally, it explores the possibilities for searching
a collection of complex XML documents using a full text retrieval engine
used together with the Z39.50 information retrieval protocol.
XML processing,
Text encoding,
Metadata,
Digital humanities,
Digitization, 2002
2002: Lecture notes: S:t Laurentius Digital Manuscript Library
In this lecture, I discussed the
experiences gained by the development of a specific service, which, using
a collection of detailed XML descriptions, provides its users access to a
collection of digitized medieval manuscripts. Secondly, I discussed the
database used from the point of view of both retrieval of the intellectual
content (the texts) of these manuscripts and of the retrieval of the
manuscripts as unique entities. Finally, I turned to the possibilities for
searching a collection of complex XML documents using a full text
retrieval engine used together with the Z39.50 information retrieval
protocol.
XML processing,
Metadata,
Digital humanities,
Digitization, 2002
2005: Ediffah
En superkort presentation om Ediffah, hållen vid
Ediffahprojektets avslutning på Kungl. Biblioteket i Stockholm den 28
oktober 2005
Metadata,
Archival description, 2005
2004: Metadata makes the world going round - en orientering om användning
av Metadata och XML
Sara Kjellberg och jag höll ett antal kurser om metadata
o. XML. detta är vår presentation. Vi höll det inom ramen för BTJs
kursutbud.
XML processing,
Metadata, 2004
2004: Vad en bra samling av digital text bör kunna
En diskussion av vilka funktioner ett bra textarkiv bör, och vad
digitalisering bör innebära.
Digital libraries,
Metadata,
Digital collections, 2004
2003: Pesistent länkning och digitala bibliotek
Åtskillig uppmärksamhet har nyligen riktats mot problemen
förknippade med att uppnå en stabilare webb. Det konstateras, helt
korrekt, att mängder med dokument bara försvinner från sina ursprungliga
platser. Vad skall man då göra åt saken? Vad är det för grundläggande
designproblem som gör att organisationer vilka underhåller länksamlingar
av olika slag tvingas bära en allt tyngre börda?
Digital libraries,
Metadata, 2003
2004: Ediffah – En digital infrastruktur för forskningsbibliotekens
arkiv- och handskriftssamlingar
Projektet syftar till att göra det möjligt att att skapa skapa
allmänt tillgängliga kataloger och arkivbeskrivningar över bibliotekens
handskriftssamlingar och personarkiv. Systemet skall vara enkelt, och
innehålla ett arbetsflöde sådant att posterna som genereras också med
automatik kan återfinnas i Nationella arkivdatabasen NAD, vårt
gemensamma bibliotekssystem LIBRIS, såväl som i lokala
databaser.
Archival description,
Metadata,
XML processing, 2004
2003: Teknisk samverkan mellan svenska ämnesportaler - Test och
utvärdering av portalprogramvaran TKL
En utvärdering av digital library produkten Keystone DLS (TKL)
Digital collections,
Metadata,
Reviews,
XML processing, 2003
2003: Implementering av OAI-PMH i ett bibliotekssystem -- Några ord på
vägen
Syftet med denna text är att ge lite kött på benen om vad OAI-PMH
är, vad det kan användas till och hur det skulle kunna integreras i ett
bibliotekssystem. Det är inte en ersättning för andra dokument utan skall
ses som några ord på vägen för organisationer som planerar att eller är i
färd med att implementera OAI-PMH. Texten skrevs på uppdrag av
https://www.axiell.com/se/
Harvesting,
Metadata,
Library catalogues, 2003
2001: Technical description of the Studera.Nu search engine Harvesting
policies, maintenance and software used
This is a description of the Studera.NU search engine in the very
first version. The search engine carries focused information, all of which is
indexed manually by content providers. The indexing information is
embedded into web pages using meta tags, and the service is built using a
harvesting robot. This article documents the functions of the search
engine Studera.NU, its robot, search software etc. It aims at providing
necessary background information both for staff involved in system
management and future developers. A second aim is to give pinpoint areas
for future developments of the service.
Web indexing,
Harvesting,
Metadata, 2001
1998: A regional distributed WWW search and indexing service - the DESIRE
way
In an attempt to implement a regional search engine we have
created an open, metadata aware system for distributed, collaborative
WWW-indexing. The system has three main components: a harvester (for
collecting information), a database (for making the collection
searchable), and a user interface (for making the information
available). All components can be distributed across networked computers,
thus supporting scalability. The system is metadata aware and thus allows
searches on several fields including title, document author, and
URL. Nordic Web Index (NWI) is an application using this system to create
a regional Nordic web-indexing service. NWI is built using five
collaborating service points within the Nordic countries. The NWI
databases can be used to build additional services. Services today include
special metadata databases, multimedia databases, and statistics about the
Nordic Web.
Web indexing,
Harvesting,
Metadata,
Z39.50, 1998
2002: XML -- en mjuk start för biblioteksfolk Mitt ständigt ofärdiga
undervisningsmaterial (...och en del annat)
Denna text syftar till att ge en överblick över vissa områden av
det digitala biblioteksområdet vilka är stadda i snabb utveckling. En
utveckling som i hög grad katalyseras av utvecklingen av olika
tillämpningar av eXtensible Markup Language, XML, som i år fyller fem år.
Utöver användningen av XML inom det digitala biblioteksväsendet ges en
överblick över modernt tänkande när det gäller metadata, hur XML kan
tänkas påverka hur vi tar del av, och hanterar elektroniska texter både i
form av digitalt bevarande och publicering av t ex
forskningsrapporter.
XML processing,
Text encoding,
Metadata, 2002
2000: Metadata harvesting
This is unfortunately unpublished, but it presents most one of
the most extensive datasets on the content of HTML embedded metadata which
I collected while working with the Nordic Webindex.
Web indexing,
Harvesting,
Metadata,
Z39.50, 2000
1999: The Noble Art of Being Indexed or the Webmaster's Guide to
Harvesting Robots
As the title indicates, this is a note on how to be indexed by
search engines. It is obsolete. Please note that it does not contain
anything about search engine optimization in the modern evil
sense. Instead it pinpoints what harvesting robots did understand, and what
they didn't at the turn of the last century.
Web indexing,
Metadata,
Structural web design, 1999
1998: En arkitektur för ett distribuerat system för spridning av
forskningsinformation
Arkitekturen för ett nätverk av tjänster för spridning av
forskningsinformation beskrivs. Nätverket tillåter distribuerat underhåll
av såväl data som metadata. Till nätverket kan anslutas såväl
bibliografiska databaser som helt WWWbaserade metadataberikade
tjänster. Metadataproduktionen följer standarden Dublin Core. De förra
typerna av tjänster inkorporeras i nätverket genom interoperabilitet på
sökprotokollsnivå, medan metadata och fulltext från de senare göres
sökbara genom en WWWrobot. Kommunikation inom nätverket utnyttjar
standardiserade Internet protokoll som HTTP, och för
informationsåtervinning Z39.50
Web indexing,
Harvesting,
Metadata,
Z39.50, 1998
1998: NWI II, An Enhanced Nordic Web index: Final report
The Nordic Web Index (NWI) project is a collaborative effort
across the Nordic countries, aiming at providing a free Worldwide Web
search service to the general public in the countries involved. NWI has
been fruitful for several reasons: First and foremost we are today
providing access to databases covering the WWW in four of the Nordic
countries and, as of September 1998, five service points in six languages
Denmark, Finland, Sweden, Norway and Iceland.
Web indexing,
Harvesting,
Metadata,
Z39.50, 1998
1997: A proposal for metadata formats for use in the Swedish Enviro-Net
This paper outlines a combination of the Dublin Core metadata
embedded in HTML metadata tags and the GILS Z39.50 profile used for
information retrieval. It is a combination would solve the distributed
indexing, search and retrieval problems within a network of environmental
authorities. The Swedish Enviro-Net lived for a few years at the end of
1990ties.
Web indexing,
Metadata,
Z39.50, 1997
My name is Sigfrid Lundberg. The stuff I publish here may, or may not, be of interest for anyone else.
On this site there is material on photography, music, literature and other stuff I enjoy in life. However, most of it is related to my profession as an Internet programmer and software developer within the area of digital libraries at the Royal Library, Copenhagen (Denmark) and, before that, Lund university (Sweden).
The content here does not reflect the views of my past or present employers