G. Ken Holman
Deborah A. Lapeyre
C. Michael Sperberg-McQueen
B. Tommie Usdin
Eric van der Vlist
The XML Guild currently has members in Belgium, Canada, Czech Republic, France, Ireland, the U.S.A., and the United Kingdom, all of whom are willing to work with customers in other locations.
Kal Ahmed is co-founder of Networked Planet Limited a company specializing in practical topic map solutions for the .NET platform. He
has a long experience with XML and SGML document management systems and more recently has worked extensively with Topic Maps both as a
founder member of TopicMaps.Org and contributor to the XTM 1.0 specification; as co-editor of the forthcoming revision of the ISO Topic
Maps standard ISO 13250 and also as a developer of the open-source topic map toolkit TM4J.
Robin Berjon has a dozen years' experience doing web development and standards during which he
released a number of open source libraries to help with web publishing and XML processing. He
was the chair of five W3C working groups (two on binary XML, two on Web APIs, one on mobile),
has edited a number of specifications (HTML5, DOM4, SVG Tiny 1.2, a few other DOM or CSS
related ones), and has participated in a dozen working groups. He's also developed mobile user
interfaces, TV programs, and the widget platform for Joost. He has contributed extensively to
open source projects.
When off work he reads books that his wife says he only buys because the titles make him look
smarter than he is, has fun with his daughters, and gets badly beaten up by his cat in
Michel Biezunski is a consultant in the field of information management based in New York City, working under the name Infoloom. He
is assisting his customers by finding innovative ways to leverage complex networks of existing information repositories, and providing
ways to interconnect pieces coming from various places. The products are navigational networks customized for various user needs (possibly
displaying multiple perspectives). Michel's working experience covers various domains, including the publishing, finance, healthcare, and
media industries, and governmental agencies. Michel's focus is in the area of semantic integration, auditable information systems,
XML/SGML Applications, navigation models within complex information sets, and hyperlink-based models. He is recognized as the main
initiator and co-inventor of the Topic Maps standard (ISO/IEC 13250). He has written many articles and developed and conducted numerous
workshops. Michel is now working on innovative solutions for auditability and integration of information systems.
Jon Bosak organized and led the working group that created XML, subsequently serving for two years as chair of the XML Coordination
Group of the World Wide Web Consortium. He is a long-time member of OASIS, the Organization for the Advancement of Structured Information
Standards, and he chaired the committee that developed the OASIS process for the definition of industry-specific XML markup standards. He
has also served on the Advisory Board of the Electronic Business XML initiative (ebXML), a joint project of OASIS and the United Nations
body for Trade Facilitation and Electronic Business (UN/CEFACT); on the Solution Provider Board of RosettaNet, the leading XML-based
supply-chain organization for the electronics industry; and on the Board of Governors of the Electronics Industry Data Exchange
Association (EIDX), a member section of CompTIA. He currently chairs the OASIS Universal Business Language Technical Committee. Articles
by Jon Bosak can be found on his web page.
Ronald Bourret is a consultant, writer, and researcher, specializing in how XML and databases work together. As a consultant, he
focuses on high-level projects, such as reviewing XML application architectures, designing features for XML / database tools, and
introducing clients to XML and how it applies to their specific situation. His writing includes XML and Databases, often considered the standard introduction to the
subject, the XML Namespaces FAQ, and an IBM Redbook about
XML support in DB2. He also
maintains a Web site with descriptions of more than 200 XML / database and XML data binding products.
Peter Flynn runs the text management consultancy Silmaril which
provides structured document solutions to clients in publishing,
financial services, training, and government.
Peter is a graduate of the London College of Printing and
the University of Westminster. He worked for a UK Training Board
and for a US computer-bureau operation as IT consultant before
joining University College Cork to work on research and academic
computing support, and then founding Silmaril Consultants.
In the 1980s he was Secretary of the TeX Users Group, and
using DAPHNE to typeset SGML for research users. In 1990 he was
Secretary of RARE WGIII when the Member for CERN demonstrated
the WWW, and he installed Ireland's first Web server a few
months later. Peter was a member of the IETF Working Group on
HTML and a contributor to the W3C XML SIG. He has published
books on HTML, SGML/XML, and LaTeX. He is editor of the XML FAQ
and a contributor to conferences and journals in electronic
publishing, markup, and Humanities computing. He is currently
completing a part-time PhD on the usability of editing
interfaces for structured documents with the Human Factors
Research Group in Applied Psychology in UCC.
Professional website: http://www.silmaril.ie
Personal website: http://blogs.silmaril.ie/peter
Email: peter (at) silmaril (dot) ie
Florent Georges is the founder and CTO of H2O
Consulting. He has been involved in the XML world for 10
years, especially within the XSLT and XQuery communities. He
is an invited expert in the XSL working group at W3C.
His main interests are in the field of XSLT and
XQuery extensions and libraries, packaging, unit and
functional testing, and portability between several
Since the beginning of 2009, he has worked on EXPath,
to define "standard" extension function libraries that can be
used in XPath (so in XSLT, XQuery and XProc as
Tony Graham is a principal of Menteith Consulting Ltd. An Australian now based in Dublin, Ireland, he has previously worked with XML
and other markup technologies in the USA and Japan. He is an invited expert on the FO subgroup of the W3C XSL Working Group and a previous
member of the W3C XML Protocol Working Group and the OASIS Web Services Reliable Messaging TC. He is also the principal author of the
xmlroff XSL formatter and the author of Unicode: A Primer, the
first book about the Unicode Standard, and numerous articles and conference presentations on XML, XSL, XSLT, and Unicode.
Ms. Harvey is President of Electronic Commerce Connection, Inc. Ms. Harvey has participated with many Government and commercial
enterprises in planning and executing their migration to structured information. She is involved in the ebXML initiative and is the
co-author of Professional ebXML Foundations published by Wrox, August, 2001, as well as many other publications. Ms.
Harvey started and coordinates the Washington, D.C. Area SGML/XML Users Group .
Prior to starting ECC, Inc., Ms. Harvey worked in Scientific and Engineering Computing at David Taylor Model Basic, NSWC. In her capacity
with the Navy she participated in the development of US DoD CALS standards including IETMs, SGML and Internet protocols.
G. Ken Holman
Mr. G. Ken Holman is the Chief Technology Officer for Crane Softwrights Ltd., a co-editor of the UBL 2.0 specification, member of the
W3C Working Group that developed XML from SGML, the founding chair of the two OASIS XML and XSLT Conformance Technical Committees and
current chair of the Code List Representation Technical Committee and UBL HISC and SBS subcommittees and two task groups, a former
international secretary of the ISO subcommittee responsible for the SGML family of standards, the current chair of the Canadian committee
to the ISO, the author of electronically-published and print-published books on XML-related technologies, and a frequent conference
Website (books/videos): http://www.cranesoftwrights.com/links/trn-guild.htm
Website (training): http://www.cranesoftwrights.com/links/sched-guild.htm
Michael Kay is the developer of the Saxon XSLT and XQuery processor. He is the editor of the XSLT 2.0 specification and is also a
member of the XQuery working group in W3C. He wrote the Wrox Press book XSLT Programmers Reference, widely accepted as
the definitive reference on XSLT, which is now in its third edition, and he has delivered a wide variety of papers, articles, and seminars
on subjects related to XSLT and XQuery. He is based in the UK, and has 30 years' experience in the industry working with a wide variety of
information management technologies. He founded Saxonica Limited in 2004 to continue the development of the Saxon technology and to
provide services to Saxon integrators and users. Assignments undertaken include customized training courses and seminars, strategic advice
on technology selection and application architecture, project mentoring, code reviews and performance tuning, and integration of Saxon
into third-party tools.
Michael Kay is the joint winner (together with Norman Walsh) of the XML Cup 2005
awarded for services to the XML community.
Jirka Kosek is a freelance XML consultant and teacher at University of Economics in Prague. He has more then 10 years experience in
providing XML consultancy and training in Czech Republic and world-wide as well. His special focus is on documentation and electronic
publishing systems. Jirka is an active member in several standardization bodies, including OASIS (DocBook TC and RELAX NG TC), W3C (XSL WG
and ITS WG) and ISO/IEC JTC1/SC34.
Jirka Kosek is an author of several books about Web technologies. He also wrote numerous articles for IT developer magazines. In his
free time he is contributing code into DocBook XSL stylesheets open-source project and
co-organizing XML Prague conference.
Deborah A. Lapeyre
Debbie Lapeyre is Vice President of Mulberry Technologies, Inc. She is an XML architect and an expert in XML vocabulary and
DTD/schema design who has worked with XML and XSLT since their inception and SGML since 1984. She serves on the Balisage: The
Markup Conference committee and has been an organizer or co-chair for Extreme Markup Languages and
several XML/SGML 'NN conferences. Ms Lapeyre has spoken and given tutorials at conferences and user groups around the
world. She is a principal architect for the National Libraries of Medicine's Journal Archiving and Interchange Tag Suite. As a senior
consultant, she leads Document Analysis teams, constructs and modifies schemas, and provides advice regarding all phases of the document
lifecycle. Through Mulberry Technologies, Inc., Ms Lapeyre provides training in a wide range of XML technologies, including XML literacy
and authoring, document analysis, DTD design and implementation, XSLT, XSL-FO, and Schematron.
Evan Lenz, President of Lenz Consulting Group, is a recognized leader in the field of XML-based publishing. He has served as invited expert on the W3C XSL Working Group, in which he contributed to the design of XSLT 2.0, XPath 2.0, and XQuery. He has authored XML-related books and articles, including XSLT 1.0 Pocket Reference, and has spoken at numerous industry conferences. In addition, he has extensive training in human communication technologies such as NLP, which uniquely enhances his approach to consulting and training. With over a decade of experience specializing in XML technologies, Mr. Lenz is equipped to deliver extraordinary value in his client partnerships.
Benoît Marchal is a Belgian consultant. He is the author of XML by Example, Second Edition and other XML books. He has also
published close to two hundred articles on XML, web services and related technologies.
Professional website www.psol.com;
Personal website www.marchal.com
Dan is president of Kelly-McCreary & Associates, LLC. Dan is a data architecture consultant, author and standards evangelist. He has
been active in XML and standards since 2000.
Dan worked at Bell Labs as a chip designer, with Steve Job's at NeXT Computer as well as founding his own consulting firm of over 75 people.
His background includes topics such as high performance computing, programming languages, databases and XML standards.
He has published articles on the semantic web, metadata registries, US Federal XML standards (GJXDM and NIEM), XForms, XQuery and XRX.
With his wife, Ann Kelly, Dan a co-author of Making Sense of NoSQL by Manning Publications. He is also
the author or editor of three XML-related wikibooks on XForms,
XQuery, and XRX.
Dan is an advocate of functional and declarative programming, standards and ultimate Frisbee. He has three adult daughters and lives in Minneapolis, MN.
Personal Blog: http://datadictionary.blogspot.com/
David Megginson, principal of Megginson
Technologies, has been active within the SGML and, later, XML communities
since 1991. He led the original initiative that created SAX, the Simple API for
XML, which is now the most widely used streaming API for XML and has
been implemented in products by IBM, Oracle, Apache, and Sun, along with many
David's work includes consulting and development for many companies and
organizations, a large number of Open
Source software packages, and two books:
Structuring XML Documents
David formerly chaired the XML Information Set Working
Group at the World Wide Web
Consortium (W3C) and served as a member of the W3C's XML
Working Group and XML Coordination Group.
David is currently chair of the annual XML
conference: the next conference will be held in Boston from 5-7 December
In Spring 2000, David was proud to receive the Java Technology
Achievement Award For Outstanding Individual Contribution to the Java
Community from Sun Microsystems and JavaPro
Steve spends much of his time on semantic integration activities, often with
reference to the ISO "Topic Maps" standard. His clients include government agencies,
technology developers, and publishers.
Steve has recently open-sourced his Versavant subject addressing engine. He assists
Michel Biezunski in maintaining the production system for IRS Tax Map. He serves as
co-editor of the Topic Maps International Standard, ISO 13250. With Patrick Durusau, he
is helping to draft ISO 13250-5, the Topic Maps Reference Model.
Steve is also co-chair the Extreme Markup Languages annual conference series in
Montreal every August (www.extrememarkup.com).
Uche Ogbuji, partner at Zepheira, specializes in the integration of next-generation Web systems with established enterprise data technology. He pioneered practical application of XML, RDF and SOA/Web Services, has led and sponsored several key open source software efforts to establish these, including Akara, Amara and EXSLT. Uche Ogbuji is a columnist for IBM developerWorks, Application Development Trends and XML.com. He has written over 300 articles on XML, Web Services and semantic technology in recognized publications, and speaks extensively at conferences worldwide.
Prior to joining Zepheira he was founder and CEO of Fourthought where for a decade he led the practical application of the above-mentioned technologies to the needs of clients including Sun Microsystems, Phillips Petroleum, Quovadx, AFFINA, Naval Surface Warfare Center and the Webb Interactive Services team where Jabber was born.
Nikita Ogievetsky is a New York based consultant. He is an expert in Information
Architecture, Data Modeling and Knowledge Sharing and Interoperability.
He leads the community in finding simple solutions for real life problems on the
enterprise scale. Nikita contributed to the XTM 1.0 specification and is a funding
member of TopicMaps.Org. He presented and published papers on the subjects of XML, XSLT,
Knowledge Technologies, Physics and general computer science. As an author he has
contributed to both XML Topic Maps (Addison-Wesley) and XSLT Cookbook
Wendell Piez, an independent consultant based in
Rockville, Maryland, specializes in markup technologies including XML,
XSLT and document modeling. In addition to designing and building applications using XML, XSLT,
XSL-FO and XPath-based technologies such as Schematron and XQuery, he advises clients on
how to build and maintain efficient and flexible document production systems. He has
taught XML, XSLT, XPath, Schematron and SVG to numerous academic and industry audiences.
A frequent presenter at conferences including the Digital Humanities,
Extreme Markup Languages and other series, he has also published
theoretical investigations regarding the semiotics of digital text encoding, and has
contributed regularly to the HUMANIST, TEI-L and XSL-List discussion forums. With
Jeni Tennison, he is co-originator of
Layered Markup and Annotation Language. Dr Piez is an active member of the Association for Computers and the Humanities (ACH),
teaches at the Graduate School of Library and
Information Science (GSLIS) at the University of Illinois at
Urbana-Champaign, and serves as General Editor of Digital Humanities Quarterly
(DHQ). He is also lead developer for the Proceedings of Balisage: The
Professional website: http://www.wendellpiez.com
Personal website: http://piez.org/wendell
Email: wapiez (at) wendellpiez (dot) com.
C. Michael Sperberg-McQueen
C. M. "Michael"
Sperberg-McQueen is the Principal of Black Mesa Technologies, providing
consulting and freelance contract work in the area of information
management using descriptive markup. He is Co-chair of Balisage:
The Markup Conference (every August in Montréal).
Formerly a member
of the technical staff at W3C, Michael was also a co-editor
of the Extensible Markup Language (XML) 1.0 spec (1998), and chair
of the XML Schema working group. He was also instrumental in the
Text Encoding Initiative (TEI), an international cooperative project
to develop and disseminate guidelines for the encoding and interchange
of electronic text for research.
Michael was co-editor, with Lou Burnard,
of the TEI's Guidelines for Electronic Text Encoding and Interchange
in 1994. He also served as Editor in chief of the TEI from 1988
Jeni Tennison is an independent consultant specialising in XSLT and XML Schema
development. She trained as a knowledge engineer, gaining a PhD in collaborative
ontology development, and since becoming a consultant has worked on using XML in a wide
variety of areas, including publishing, water monitoring and financial services. She is
the author of
XSLT & XPath On
(Hungry Minds, 2001),
(Wrox, 2003) and
(Apress, 2005), one of the founders of the EXSLT initiative to standardise extensions to
XSLT and XPath, and an invited expert on the W3C XSL and XML Processing Working
B. Tommie Usdin
Tommie Usdin is President of Mulberry Technologies, Inc. She has been working with
XML and XSLT since its inception and SGML since 1985. She chairs Balisage: The
Markup Conference and previously chaired the Extreme Markup
Languages conferences. She has given presentations, papers, and articles
on numerous XML related subjects. Ms Usdin was on the editorial board of the 15th
edition of the Chicago Manual of Style and was co-editor of Markup Languages:
Theory and Practice, a peer-reviewed quarterly by MIT Press. She is lead
developer of the National Libraries of Medicine's Journal Publishing Tag Set, an XML
vocabulary used by many bio-science journals. Through Mulberry Technologies, Inc., she
provides training in a wide range of XML and SGML technologies including; XML, XPath,
XSLT, XSL-FO, and Schematron.
Eric van der Vlist
Eric van der Vlist is CEO and founder of Dyomedea. This seasoned engineer
has a passion for new technologies (especially for the Internet, XML and open source
software). His main activity is consulting but he also delivers trainings and is the
author of several books on XML schema languages and Web 2.0.
spare time, Eric is a beekeeper and a fruit farmer (link in
Priscilla Walmsley is a consultant and trainer specializing in XML architecture and implementation, XML and XML Schema design, XQuery and XSLT development, electronic publishing and content management. Ms. Walmsley has over fifteen years experience as a consultant, software architect, developer, and data administrator. She has held positions at RELTECH Group, Platinum technology, XMLSolutions Corporation (as a VP and co-founder), and Vitria Technology.
Walmsley was a member of the W3C XML Schema Working
Group from 1999 to 2004, where she served as an Invited Expert. She is
the author of
(Prentice Hall 2012), and
(O'Reilly Media 2007). In addition, she co-authored the book
Web Service Contract Design and Versioning for SOA
(Prentice Hall 2008).
Sam Wilmott started using markup languages in the late '60s. Since then he has led
the development of typesetting/text-formatting systems for the Canadian Government
Printing Office and for a major real-estate company, implemented one of the first SGML
parsers (which was also the first pull-model markup parser), and is the originator of
the OmniMark programming language (http://developers.omnimark.com), with its strong support of SGML, XML,
and text transformation.
Nowadays Sam is working in the XSLT world: he has recently contributed to the
implementation of an XSLT compiler and currently works as an XSLT programmer and
analyst. And is thinking about where XML processing is heading.
Mohamed Zergaoui is CEO and founder of Innovimax. Based in Paris, very involved in standards, he is a Member of
XSL and XML Processing Working Groups, as
well as ISO JTC 1/SC 34.
He is also an organizer of XML Prague Conference.
He provides consulting and teaching to big publishing customers, as well as
developping the whole chain for some emerging publishers (like Droit-Algerie).
His main focus is making XML mainstream, by focusing on optimisation, especially