W3C News

Proposed Recommendations published for Web Annotation

The Web Annotation Working Group has published a Proposed Recommendation for three documents:

  • Web Annotation Data Model: This specification describes a structured model and format, in JSON, to enable annotations to be shared and reused across different hardware and software platforms. Common use cases can be modeled in a manner that is simple and convenient, while at the same time enabling more complex requirements, including linking arbitrary content to a particular data point or to segments of timed multimedia resources.
  • Web Annotation Vocabulary specifies the set of RDF classes, predicates and named entities that are used by the Web Annotation Data Model. It also lists recommended terms from other ontologies that are used in the model, and provides the JSON-LD Context and profile definitions needed to use the Web Annotation JSON serialization in a Linked Data context.
  • Web Annotation Protocol: This specification describes the transport mechanisms for creating and managing annotations in a method that is consistent with the Web Architecture and REST best practices.

Comments are welcome through 14 February 2017.

Proposed Recommendations published for XQuery WG and XSLT WG

The XML Query Working Group and XSLT Working Group have published a Proposed Recommendation for four documents:

  • XQuery and XPath Data Model 3.1: This document defines the XQuery and XPath Data Model 3.1, which is the data model of XML Path Language (XPath) 3.1, XSL Transformations (XSLT) Version 3.0, and XQuery 3.1: An XML Query Language. The XQuery and XPath Data Model 3.1 (henceforth “data model”) serves two purposes. First, it defines the information contained in the input to an XSLT or XQuery processor. Second, it defines all permissible values of expressions in the XSLT, XQuery, and XPath languages.
  • XPath and XQuery Functions and Operators 3.1: The purpose of this document is to catalog the functions and operators required for XPath 3.1, XQuery 3.1, and XSLT 3.0. It defines constructor functions, operators, and functions on the datatypes defined in XML Schema Part 2: Datatypes Second Edition and the datatypes defined in XQuery and XPath Data Model (XDM) 3.1. It also defines functions and operators on nodes and node sequences as defined in the XQuery and XPath Data Model (XDM) 3.1.
  • XML Path Language (XPath) 3.1: XPath 3.1 is an expression language that allows the processing of values conforming to the data model defined in XQuery and XPath Data Model (XDM) 3.1. The name of the language derives from its most distinctive feature, the path expression, which provides a means of hierarchic addressing of the nodes in an XML tree. As well as modeling the tree structure of XML, the data model also includes atomic values, function items, and sequences.
  • XSLT and XQuery Serialization 3.1: This document defines serialization of an instance of the data model as defined in XQuery and XPath Data Model (XDM) 3.1 into a sequence of octets. Serialization is designed to be a component that can be used by other specifications such as XSL Transformations (XSLT) Version 3.0 or XQuery 3.1: An XML Query Language.

Comments are welcome through 28 February 2017.

Proposed Recommendations published for XQuery WG

The XML Query Working Group has published a Proposed Recommendation for two documents:

  • XQuery 3.1: An XML Query Language: XML is a versatile markup language, capable of labeling the information content of diverse data sources including structured and semi-structured documents, relational databases, and object repositories. A query language that uses the structure of XML intelligently can express queries across all these kinds of data, whether physically stored in XML or viewed as XML via middleware. This specification describes a query language called XQuery, which is designed to be broadly applicable across many types of XML data sources.
  • XQueryX 3.1: XQueryX is an XML representation of an XQuery. It was created by mapping the productions of the XQuery grammar into XML productions. The result is not particularly convenient for humans to read and write, but it is easy for programs to parse, and because XQueryX is represented in XML, standard XML tools can be used to create, interpret, or modify queries.

Comments are welcome through 28 February 2017.

Webmention is a W3C Recommendation

The Social Web Working Group has published a W3C Recommendation of Webmention. A Webmention is a notification that one URL links to another and is a simple way to notify any URL when you mention it on your site. From the receiver’s perspective, it’s a way to request notifications when other sites mention it.

W3C and OGC put more Spatial (and space-born) Data on the Web

The Spatial Data on the Web Working Group, a collaboration between W3C and the Open Geospatial Consortium, has published 4 documents today. QB4ST adds extensions to the RDF Data Cube for spatio-temporal components. These are designed to make it easier to share and manipulate data such as Earth Observations with linkable slices through time and space. The QB4ST extensions are used in another of today’s publications, Publishing and Using Earth Observation Data with the RDF Data Cube and the Discrete Global Grid System, which shows how SPARQL queries can be served through OGC’s developing Discrete Global Grid System for observations, coupled with a triple store for observational metadata. The approach makes use of the power of Linked Data on the Web without requiring all data points to be encoded as RDF triples.

The latest Working Draft of the Semantic Sensor Network Ontology sets out a modular approach that allows alignment with related vocabularies. The modular architecture supports the judicious use of “just enough” semantics for diverse applications, including satellite imagery, large scale scientific monitoring, industrial and household infrastructure, citizen observers, and the Web of Things. Finally, the Working Group is pleased to publish an update to its Spatial Data on the Web Best Practices document that advises on best practices related to the publication and usage of spatial data on the Web; the use of Web technologies as they may be applied to location.

Updated Resources: Planning and Managing Web Accessibility

The Education and Outreach Working Group (EOWG) has updated three resources. Planning and Managing Web Accessibility helps you integrate accessibility throughout the Web production process. It applies to individual projects and at the organizational level. Developing Organizational Policies on Web Accessibility helps you develop a simple or comprehensive Web accessibility policy for an organization. Web Accessibility First Aid: Approaches for Interim Repairs is intended to help with the situation: "I need to make my website accessible and I don’t even know where to start!" It provides guidance on addressing short-term accessibility fixes. Read more about the Web Accessibility Initiative (WAI).

Updated: Easy Checks, A First Review of Web Accessibility

The Education and Outreach Working Group (EOWG) has updated Easy Checks – A First Review of Web Accessibility. This resource helps you start to assess the accessibility of a Web page. With these simple steps, you can get an idea whether or not accessibility is addressed in even the most basic way. These checks cover just a few accessibility issues and are designed to be quick and easy, rather than definitive. This update includes a new check on Moving, Flashing, or Blinking Content and instructions for the Web Developer Toolbar for multiple browsers. Read more about the Web Accessibility Initiative (WAI).

Open Web Platform year-end Highlights 2016

W3C icon and text CSS 20W3C published today Open Web Platform year-end Highlights 2016. We invite you to read how we are moving the Web ahead by continuously enhancing Web technology in particular in areas such as Virtual Reality, Web Payments, Web security and authentication, media playback, Web and Automotive, and by strengthening the core of the Web, HTML. Celebrate with us the 20th anniversary of CSS starting 17 December and throughout the coming year. Lastly, learn how the Web impacts your industry by meeting Members of the W3C Team at CES on 5-8 January 2017, Las Vegas, NV, USA. Come meet and discuss – we will be in Suite #313 at the Westgate Hotel.

Call for Review: Data on the Web Best Practices

The W3C Data on the Web Best Practices is now a Proposed Recommendation. Complemented by the Dataset Usage and Data Quality vocabularies (both published today as stable Notes), the Best Practices set out how publishers can share data on the Web with maximum benefit by harnessing the Network Effect. Areas like licensing, provenance, access APIs, identifiers for and within datasets, feedback, enrichment and preservation are all covered in this comprehensive work.

The Data on the Web Best Practices Working Group has compiled a substantial implementation report that demonstrates that the Best Practices are followed across many domains including government, scientific research and cultural heritage. The three documents are designed to further develop a dynamic ecosystem in which data can be discovered, understood, evaluated and reused, and that reuse recognized. Comments are welcome through 15 January 2017.