xFront schema lab
Release log / current

Changes to tools and references.

New examples, useful reference updates and changes to the tools you can use here.

Latest2026-09-07
ChannelStable

2026-09-07 · Try three XML Schema decisions

Three new lessons let you change a small schema and see how its accepted XML changes. Each includes a comparison table and downloadable XSD and XML files for the selected example.

  • Nillable versus minOccurs: compare an absent element, an empty element, an explicit nil marker and a supplied value. Change whether the element is required, whether nil is allowed and whether its type is a string or integer.
  • Sequence, choice and all: switch the content model and try differently ordered child elements. The result explains which part of the selected example passes or fails.
  • elementFormDefault: compare qualified and unqualified local elements. Try a default namespace, an explicit prefix or a namespace reset, then inspect the resulting element names.

These experiments cover the small examples shown on each page. For a larger schema, download the example as a starting point and check your own instances with the XSD processor used by your application.

2026-09-07 · Explore, practise and download US states

The US states reference now includes a schematic state selector. Select a state to see its capital, postal abbreviation and capital coordinates. The tile arrangement is a navigation aid, not a geographic map.

Search the full table by state, abbreviation or capital. A result count shows how many rows match, and the clear button restores the complete list. Printing includes all 50 states even when a search is active.

The capital quiz offers ten different questions per round and a chance to retry missed answers. CSV, JSON and XML downloads contain the same 50 records, so you can choose a format without changing the dataset.

Display corrections keep the table heading clear of its first rows and make the XML Schema selection labels easier to read on narrow screens.

2026-07-21 · More reference topics and tool guidance

The reference collection includes DFDL, formal languages, functional programming, Microformats, OWL, RDF and RDF Schema, alongside XML Schema and Schematron. Browse the standards map to find the relevant specification family or the examples collection for a small exercise.

Tool documentation explains the limits of each result: XML formatting can change serialization; the XSD analyzer reports declaration structure; Schema Diff highlights changes for compatibility review; and OpenAPI-to-MCP Readiness helps review an API description. None of these results is a general certificate of standards conformance.

Common questions appear as expandable answers. Open the question you need with a click or the keyboard; the answers remain available when JavaScript is disabled.

2026-07-20 · Four browser workbenches

Pasted inputs are processed in the active browser tab. Each workbench explains its supported inputs and limitations beside the tool.

Query set / FAQ

Frequently asked questions

01What changes are recorded in the xFront changelog?

The log covers new examples, observable tool behavior, supported inputs, reference updates and corrections that affect how you use a page or interpret a result.

02How are corrected technical claims documented?

A correction names the affected subject and describes the changed conclusion or boundary. When behavior can be tested, the related example or audit is updated with the page.

03Can I download the new XML Schema examples?

Yes. Each of the three interactive lessons offers XSD and XML downloads for the selected example. Keep the two files together and use the lesson’s stated assumptions when checking the result with your processor.

04Where are current tool limitations published?

Each workbench documents its limitations beside the tool and result. The methodology page explains the wider testing policy, while this changelog records material changes to those boundaries.