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Erik Wilde

Biography

Erik works in UC Berkeley's School of Information where he teaches Web Architecture and XML Technology courses. He has been working with XML since its invention, and is mainly interested in anything related to XML documents and the models they represent, which means schema languages, transformations, Web services, and query languages. His second major field of interest is Web Architecture and how to use it to build open information systems. The main application areas he is currently looking at are mobile Web and location, and e-learning and Open Content.

Blog

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Document Design Matters

October 02 2008

The classical approach to the data aspect of system design distinguishes conceptual, logical, and physical models. Models of each type or level are governed by metamodels that specify the kinds of concepts and constraints that can be used by each model; in most cases metamodels are accompanied by languages for… read more

Document Design Matters

October 02 2008

The classical approach to the data aspect of system design distinguishes conceptual, logical, and physical models. Models of each type or level are governed by metamodels that specify the kinds of concepts and constraints that can be used by each model; in most cases metamodels are accompanied by languages for… read more

On xml.com

September 26 2008

xml.com has been around for a long time now, and for a most of that time was considered to be one of the best information sources about XML technologies. It published articles and news and was very focused on people... read more

Binary XML (EXI) Last Call

September 22 2008

On September 19, the W3C published the Last Call Working Draft for Efficient XML Interchange (EXI). Like many other XML technologies, it is not really about XML, it is about an efficient binary representation for Infosets, which are the data... read more

Binary XML (EXI) Last Call

September 22 2008

On September 19, the W3C published the Last Call Working Draft for Efficient XML Interchange (EXI) -- which allows XML-based implementations to exchange documents without having to use XML's verbose syntax. read more

The Elements of XML Style

September 19 2008

Recently, I have been approached to consider writing a small book to be called The Elements of XML Style. My initial reaction was that I liked the title and my personal interpretation of it. My idea is that a book... read more

The Elements of XML Style

September 19 2008

What topics would you like to see in a real-world book about good XML style and use? read more

Poor Man's XQuery Update

September 12 2008

The IETF just published RFC 5261, an XML patch update framework. It's not a complete diff utility for XML, but it's somewhere between the obsolete XUpdate and the complex XQuery Update Facility. read more

Grouping in XQuery

July 16 2008

One of the really convenient features introduced in XSLT 2.0 is Grouping. It is a typical second-generation change in a programming language: Not essential for the language itself (grouping can be done by hand using techniques such as the Muenchian... read more

RDF Parsing in XSLT

June 30 2008

During the recent discussion of the OAI-ORE drafts (which use RDF), the claim was made that RDF is serialized in RDF/XML and thus could be considered an XML representation of the underlying data model. My response to that was that... read more

Associating Resources with Namespaces

June 27 2008

The W3C just published a new TAG Finding called Associating Resources with Namespaces. Here's the abstract: This Finding addresses the question of how ancillary information (schemas, stylesheets, documentation, etc.) can be associated with a namespace. I don't quite understand why... read more

XML Fever

June 24 2008

have you ever heard of tree trauma, infoset ignorance, model myopia, or RDF rage? if not, and you are interested in these and other XML-related ailments, you might want to read about XML fevers: The Extensible Markup Language (XML), which... read more

OAI-ORE Compound Documents Drafts Published

June 11 2008

Last week, the Open Archives Initiative (OAI) published a set of beta-stage recommendations for compound documents, called Object Reuse and Exchange (ORE). This set of specifications has been published as version 0.9 and has been released for public review and... read more

*OA Overload

May 20 2008

I guess I am suffering from *OA overload. Trying to understand landscapes which are still developing and where religious and partisan statements happen frequently can be hard. Or maybe it's impossible. I am seeing too many *OAs these days. This... read more

X(HT)ML Fragment Identifiers

May 19 2008

The recently published HTML 5 draft does not change anything regarding HTML fragment identifiers. They are still limited to IDs only (with <a name=""> as alternative for backwards-compatibility). This means that any reference into an HTML page depends on how... read more

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Erik Wilde