releases
2025
0.2.23
Visual Studio 2026
Macos Tahoe
OpenBSD 7.8
CSS 2025 snapshots
GS1 ontology version 1.5.1 folded into 1.5.
added GS1 ontology versions 1.6 to 1.11, 1.16
underlying work
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Windows x64 installer
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Windows arm64 installer
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Mac ARM zipped app
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Mac Intel zipped app
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source
released 25 11 24
0.2.22
RSS media, trackback, and creativecommons namespaces
GEORSS and GML namespaces
DPV ontology 2.2
croissant ontology 1.22
tentative support for visual studio 2026
various bug fixes
underlying work
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Windows x64 installer
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Windows arm64 installer
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Mac ARM zipped app
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Mac Intel zipped app
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source
released 25 11 14
0.2.21
Living Standard October 2025
analyse ads.txt
analyse robots.txt
partially analyse ATOM files
partially analyse RSL files
partially analyse RSS files
analyse security.txt
various bug fixes
underlying work
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source .
released 25 9 30
0.2.20
better liaison between SSC and OpenBSD’s httpd
underlying work
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source .
released 25 8 30
0.2.19
Refined HTML validation
updated REL attribute validation
partial implementation (levels 1 to 3) of URI templates
(see RFC 6570 ).
various bug fixes
underlying work
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source .
released 25 8 24
0.2.17
Living Standard July 2025
can sign and verify output (Windows x64, uses libreSSL , build your own)
underlying work
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source .
released 25 7 26
0.2.16
fix crash in GUI
various bug fixes
underlying work
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source .
released 25 5 29
0.2.15
this version has a GUI crash, prefer 0.2.16 or later (above)
initial nitpicking of WebVTT files
schema.org 29.2
underlying work
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source .
released 25 5 25
0.2.12
added ARIA 1.1, 1.2 & 1.3 (draft), and ARIA Digital Publishing.
added warnings for missing transcription and description <TRACK>s for media elements
Added OUTPUT configuration section (to control output details)
added --LINKS.REQUIRED for required links on pages, such as T&C, legal, etc..
added living standard COMMAND, COMMANDFOR and ONCOMMAND attributes
better checking of <IFRAME> ALLOW attribute
faux AI <THINK> element treated rather like <DIV>—with a warning
updated schema legislation and shipping types
added bribe schema (technically referred to as FinancialIncentive)
remove dependency on CURL
underlying work
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source .
released 25 3 18
0.2.11
introduced an unsigned windows installer for arm64
introduced macos app for both intel and arm
croissant ontology 1.1 beta
schema.org aggregate element property
various bug fixes
underlying work
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source
released 25 2 3
0.2.10
ssc-wx, the gui version, is no longer entirely unusable, but will be subject
to significant change in the near term. It fails to fail
spectacularly when built under Windows x64/arm64 or macos
sequioa amd64/arm64. It has not been tested on other systems (yet).
Currently, the help files are extremely unhelpful.
introduced an unsigned windows installer for x64 only
added living standard <DIALOG> CLOSEDBY attribute
underlying work
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source
released 25 1 19
0.2.9
MathML 4 and 4 core now apply the November 2024 draft
SVG 2.1 now applies the November 2024 draft
added popover=hint
added some security warnings (mostly from OWASP)
add --link.special to report use of special domains
various bug fixes
underlying work
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released 25 1 14
0.2.8
living standard january 2025
update CSS 2024 snapshots, adding 24+++
dcat ontology version 3.0
partial checking of older spdx ontologies
ptr ontology
underlying work
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released 24 1 1
2024
0.2.7
living standard :open pseudo selector
improve sequoia arm build
croissant ontology, as much as is practical
expand and document JSON-LD
various bug fixes
underlying work
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released 24 12 12
0.2.6
schema.org version 28.1
various bug fixes
underlying work
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released 24 11 30
0.2.5
living standard ALPHA and COLORSPACE attributes
schema.org actionProcess
added --html.wx, --mf.pretty and --ontology.pretty
expanded Server Side Include processing
various bug fixes
underlying work
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released 24 11 18
0.2.4
remove Windows build dependency on vcpkg
added noopener-allow-popups
offer a simple shell
various bug fixes
underlying work
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released 24 9 27
0.2.3
living standard october 2024
schema.org version 28
DPV ontologies to v2.0
macos sequoia
various bug fixes
underlying work
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released 24 7 24
0.2.2
schema.org version 27.0.2
most DPV ontologies to v0.7
CSS Viewport Module Level 1, January 2024 draft
various bug fixes
underlying work
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released 1 7 30
0.2.1
Living Standard July 2024
CSS 2024 snapshot
schema.org version 27.01
“4. Safe to Release pre–CR Exceptions” (CSS Snapshots, 2018 onwards)
underlying work
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released 24 6 27
0.2.0
Living Standard April 2024
schema.org 27.0
OpenBSD 7.5
ICANN .internal recommendation
various bug fixes
underlying work
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released 24 6 8
0.1.60
add rel=“expect’ from current living standard
various CMake improvements
underlying work
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released 24 2 29
0.1.59
Withdraw support for Macos High Sierra and earlier
Withdraw support for OpenBSD 6.8
various CMake improvements
underlying work
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released 24 2 21
0.1.58
recognise ICANN’s .internal
various CMake improvements
underlying work
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released 24 2 19
0.1.56
fix NO_GSL build
various bug fixes
underlying work
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released 24 2 14
0.1.55
schema.org 26.0
various bug fixes
underlying work
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released 24 2 14
0.1.54
prepare macports submission
submit openbsd port (for 0.1.53)
various bug fixes
underlying work
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released 24 2 12
0.1.53
schema.org 25.0
Visual Studios 2017/2019 solutions now use vcpkg
various bug fixes
underlying work
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released 24 2 9
0.1.52
Fix Macos bug error introduced in 0.1.51
more dynamic load
various bug fixes
underlying work
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released 24 1 24
0.1.51
USE 0.1.52; this has a macos build error
most libraries set to dynamic load
updated CSS 2023 Snapshot to December 2023 specification
underlying work
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released 24 1 22
0.1.50
schema.org version 24.0
Living Standard January 2024
Optional obnoxious GUI
VC 2022 now uses vcpkg
introduce arguments/answer cycle
recategorised some switches
reduce default thread count to 1
address more Apple clang bugs
various bug fixes
underlying work
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released 24 1 15
2023
0.1.49
updated stats reports
microdata switch section renamed to ontology
various bug fixes
underlying work
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released 23 12 2
0.1.48
Freebsd 12.4 and 13.2
renamed --general.slob as --general.sloven
various bug fixes
underlying work
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released 23 11 19
0.1.47
amended --general.vcs filename list
various bug fixes
underlying work
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released 23 11 13
0.1.46
NOTE 0.1.46 has a type bug; prefer 0.1.47
CSS Box Sizing 4
CSS Text Overflow 4
CSS Spatial Navigation 3
added -A switch
--general.exclude now uses simple matching
--link.pretend now uses simple matching
generalised --general.git as --general.vcs
various bug fixes
underlying work
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released 23 11 13
0.1.45
CSS Marquee
restore VS 2017 build
OpenBSD package ready
various bug fixes
underlying work
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released 23 11 8
0.1.44
CSS Generated Content 3
CSS Region 3
CSS Scoping 3
CSS Scroll-Driven Animations 3
CSS View Transitions 3
improved integration of SVG and CSS
various bug fixes
underlying work
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released 23 11 5
0.1.43
OpenBSD 7.4
Macos Sonoma
CSS Custom Highlights 3
CSS Non-Element Selectors 3
CSS Paged Media 3
CSS Shadow Parts 3
various bug fixes
underlying work
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released 23 10 24
0.1.42
schema.org 23.0
CSS Overscroll 3
CSS Page Floats 3
CSS Presentation Levels 3
CSS Pseudo-Elements 4
CSS Rhythmic Sizing 3
CSS Round Display 3
CSS Ruby Annotations 3
CSS Scrollbar Anchor 3
various bug fixes
underlying work
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released 23 10 21
0.1.41
all CSS snapshots
CSS Conditional Rules 3
CSS Conditional Rules 4
CSS Conditional Rules 5
CSS Lists 3
CSS Text 3
CSS Text 4
various bug fixes
underlying work
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released 23 10 18
0.1.40
CSS Colour Adjustment 3
CSS Device Adaption 3
CSS Exclusions 3
CSS Inline Layout 3
CSS Line Grid 3
CSS Logical Properties 3
CSS Scrollbar Style 3
underlying work
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released 23 10 14
0.1.39
CSS Contain 5
CSS Contain 4
CSS Contain 3
CSS Filter 3
CSS Scroll Snap 3
various bug fixes
underlying work
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released 23 10 10
0.1.38
CSS 2015 Snapshot
CSS Mobile Profile 2
CSS Print Profile
CSS TV Profile
CSS Will Change 3
drop VS 2017
underlying work
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released 23 10 8
0.1.37
CSS Images 4
CSS Masking 3
CSS Transforms 3
CSS Transforms 4
various bug fixes
underlying work
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released 23 10 7
0.1.36
Living Standard October 2023
CSS Images 3
--html.ie ignores certain old internet explorer naughtitudes
--html.safari ignores certain old safari naughtitudes
underlying work
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released 23 10 1
0.1.35
CSS Speech 3
CSS Text Decoration 3
CSS Text Decoration 4
underlying work
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released 23 9 22
0.1.34
Fabio 2.1 ontology
Prism ontologies, partial
Adobe ontologies, partial
Exif ontologies, partial
various bug fixes
underlying work
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released 23 9 16
0.1.33
ADMS 1.0 and 2.0 ontologies
BFO 2.0 and 2020 ontologies
disco (ddi ontology)
various bug fixes
underlying work
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released 23 9 2
0.1.32
CSS Grid 3 (partial)
CSS Grid 4 (partial)
CSS Shapes 3
various bug fixes
underlying work
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released 23 8 25
0.1.31
CSS Writing Mode 3
CSS Writing Mode 4
biro ontology
cito ontology
various bug fixes
underlying work
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released 23 8 5
0.1.30
CSS Box Alignment 3
CSS Box Model 3
CSS Box Model 4
CSS Display 3
CSS Multi-Column 3
CSS Overflow 3
CSS Positions 3
CSS Transitions 3
X-Clacks-Overhead
various bug fixes
underlying work
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released 23 7 15
0.1.29
CSS Counter Style 3
CSS Flexible Box Layout 3
underlying work
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released 23 7 9
0.1.28
CSS Font 3
CSS Font 4 (December 2021 draft)
CSS Font 5 (December 2021 draft)
underlying work
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released 23 7 8
0.1.27
CSS Compositing
CSS Fragmentation 3
CSS Fragmentation 4 (December 2018 draft)
schema.org 22
various bug fixes
underlying work
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released 23 7 1
0.1.26
CSS Backgrounds and Borders (Feb 2023 version)
CSS Colour 5
CSS Easing Functions
further improve build time
various bug fixes
underlying work
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released 23 6 28
0.1.25
Living Standard July 2023
output nit references, where applicable
various bug fixes
underlying work
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released 23 6 21
0.1.23
CSS Animation 3 (called 1, but not part of CSS 1 spec)
CSS Animation 4 (called 2, but not part of any CSS 2 spec)
CSS Values 4
various bug fixes
underlying work
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released 23 6 13
0.1.22
linux ARM64 (centos 9 tested)
schema.org default now version 21
CSS Values 3
underlying work
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released 23 6 1
0.1.21
schema.org updated (default still 15.0)
ARM64 builds for macos and windows
underlying work
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released 23 5 24
0.1.19
CSS 3 Cascade
CSS 4 Cascade
CSS 5 Cascade
CSS 6 Cascade (March 2023 draft)
CSS 4 Colour
CSS Custom Properties
CSS 4 Selectors (November 2022 draft)
CSS 3 Syntax
Abhorrent nits for markup that disgusts
underlying work
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released 23 4 8
0.1.18
WhatWG Living Standard (April 2023)
CSS 5 Media
CSS 4 Media
underlying work
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released 23 4 1
0.1.17
CSS 3 Basic User Interface
CSS 4 Basic User Interface (March 2021 draft)
CSS 3 Colour
CSS 3 Media
underlying work
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released 23 3 25
0.1.16
CSS STYLE attribute
CSS 3 accessibility
underlying work
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released 23 3 19
0.1.15
CSS 3 Namespaces
CSS 3 Selectors
underlying work
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released 23 3 18
0.1.13
Living Standard for January 2023
CSS 2.0 verification
CSS 2.1 verification
CSS 2.2 (February 2022 draft) verification
underlying work
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released 23 2 16
0.1.12
NOTE: many tests fail in this version; they need CSS 3 which isn’t there yet
CSS 1 verification
expanded stats for CSS
output id-* renamed as itemid-*, class-* generalised to tally-*
macOS Ventura
OpenBSD 7.2
underlying work
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released 23 1 1
2022
0.1.11
added --link.pretend REGEX which pretends the link regex exists locally
tighten poetry ontology
various bug fixes
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released 22 10 19
0.1.9
Living Standard for October 2022
poetry ontology 1.1
various reliability improvements
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released 22 10 3
0.1.8
unknown class names are retained when shadowing
various reliability improvements
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released 22 9 30
0.1.6
partial MathML 4 core (21 July 2022 draft)
backport to Yosemite
underlying work
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released 22 9 7
0.1.5
restore Visual Studio 2017 solution
backport to older versions of macos
underlying work
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released 22 9 3
0.1.3
dropped date library & boost process (both use system ())
replaced curl executable with curl library
drop visual studio 2017 solution
more linux flavours tested
builds under freebsd 12.3 & 13.1
download source
released 22 8 28
0.1.2
trial OpenBSD port
Linux builds require lsb_release
underlying work
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released 22 8 23
0.0.134
further performance improvements
underlying work
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released 22 8 17
0.0.133
further performance improvements
underlying work
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released 22 8 15
0.0.132
further performance improvements
underlying work
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released 22 8 13
0.0.131
living standard for July 2022
underlying work
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released 22 7 31
0.0.130
performance improvement with multithreading
can exclude files from processing, such as git files
can list all classes used, not just those defined in CSS files
uses Howard Hinnant’s date library
fix schema hierarchy property type checks
underlying work
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released 22 7 30
0.0.129
improve diagnostics of invalid HTTP-EQUIV entries
underlying work
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released 22 6 20
0.0.128
Moved CMakeLists.txt to project root to appease certain packagers
process schema.org versions before v2.0
fixed some ontology verification bugs
underlying work
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released 22 6 16
0.0.125
schema.org 14.0
mark schema.org attic content as deprecated
gs1 microdata now recognised
make default protocol https (it was http)
removed webmention code
various refinements & bug fixes
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released 22 4 5
0.0.124
builds under Centos 9 streams
report unexpected content in configuration file
use a binary switch to select option, & a new ‘no’ switch to deselect it
documented certain previously hidden switches
various refinements & bug fixes
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released 22 2 13
0.0.123
Improved spell checks with ICU libraries (use --spell.icu to disable them)
added --link.example, --link.local and --link.report
documented certain previously hidden switches
various refinements & bug fixes
download source
released 22 2 6
0.0.122
Added spelling checks & spell.xxx switches (requires hunspell on unix)
Changed behaviour of binary switches (args are now processed, not presumed)
A number of features are enabled by default
underlying work / various refinements
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released 22 1 16
0.0.121
Living Standard Jan 2022 (very similar to October 2021)
Drop 32 bit builds & macos before catalina
underlying work
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released 22 1 5
2021
0.0.120
RDFa
added --ontology.list to list known ontology schema
added --ontology.ONT x.y to set the default version of ontology ONT
download source
released 22 1 2
0.0.119
macos Monterey
underlying work / various refinements
download source
released 21 12 21
0.0.118
Visual Studio 2022 solution
underlying work / various refinements
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released 21 11 22
0.0.116
change default HTML to living standard Oct 2021
OpenBSD 6.9 / 7.0
underlying work / various refinements
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released 21 10 24
0.0.115
set unii installation directory to ~/bin
added experimental solution for Visual Studio 2022 preview
XHTML role attribute (https://www.w3.org/TR/xhtml-role/)
now requires boost 1.75 or better
unii builds now require CMake 3.12 or better
underlying work
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released 21 10 17
0.0.113
RDFa with schema.org, but otherwise no core initial context (yet)
restore progress report via -D switch
underlying work
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released 21 9 30
0.0.111
living standard july 2021
schema.org v 13.0
added --shadow.enable
drop Visual Studio 2015
download source
released 21 8 21
0.0.109
update flag, so SSC only looks at files that have changed recently
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released 21 6 29
0.0.108
default version of HTML 5 switched to W3’s HTML 5.2.
added example website update script
specify which page content goes in the corpus
download source
released 21 6 15
0.0.107
SVG 1.2/Tiny
partial SVG 1.2/Full (May 2004 draft):
conflicts with 1.2/Tiny always resolved in favour of 1.2/Tiny
extensions parsed but not processed
not complete, nor will it ever be
SVG 2.0 (August 2018) with:
December 2018 Filter Effects
April 2021 Animations draft
SVG 2.0 (April 2021 draft) (2.1 to be?) with:
October 2019 Filter Effects
April 2021 Animations draft
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released 21 6 05
0.0.105
improved diagnostics on abort
underlying work
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released 21 6 24
0.0.101
MathML 4, Dec 2020 draft (it’s early days; MathML 4 is really MathML 3 with post–it notes)
can run in the OpenBSD 6.8 httpd server CGI environment
(do NOT expose SSC to untrusted data sources, such as those on the open web, without taking
serious precautions: SSC is α software, and probably has more bugs than the
Creator’s Ultimate All–Beetle Extravaganza)
--shadow.changed: only update files in the shadow directory when the originals have changed
expanded ligature suggestions now work across systems
recognise the non–standard character codes &bang; &hash; &splat; &squiggle; (! # * ~)
improvements to corpus data extraction
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released 21 4 21
0.0.100
can nitpick against WhatWG Living Standard April 2021 (except MathML 4 & SVG 2)
expanded character code suggestions, particularly for ligatures (Windows only)
improved aria attribute verification
the environment variable SSC_CONFIG can specify a configuration file
the environment variable SSC_ARGS can specify command line arguments
specify custom elements and custom attributes (see recipe/toast/type/custom/* for example)
dump site corpus with -d switch
download source
released 21 4 16
0.0.99
checks microformats in microdata
export living standard & microformats microdata
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released 21 4 11
0.0.98
living standard microdata ITEMTYPEs processed
stats now only counts reported errors
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released 21 4 7
0.0.97
living standard jan 2005 – jan 2021, mostly
MathML 4 and SVG 2 are not currently understood
various microdata, including vcard, vevent, purl.org and n.whatwg.org, are not currently understood
no spellchecker
download source
released 21 3 31
0.0.94
<INPUT> PATTERN checks
improved diagnosis output
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released 21 3 20
0.0.92
recognise open graph meta names
expand mime type checking
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released 21 3 16
0.0.89
more media type / file extension checks
underlying work
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released 21 3 5
0.0.85
additional stats options, reporting <DT><DD>, <ABBR>>, & <DFN> content
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released 21 2 12
0.0.83
verifies various new living standard referenced http-equiv pragmas
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released 21 2 01
0.0.81
--schema.version now accepts x.y style versions
--schema.minor removed
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released 21 1 24
0.0.80
adds a (prototype) man page (recipe/tea/gen.txt)
adds --stats.meta to generate stats on <META> usage in <HEAD>
checks content-security-policy values
download source
released 21 1 18
0.0.79
A new -z switch to specify the maximum preferred length of title text;
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released 21 1 15
2020
0.0.77
checks that the HTML page and the charset declared on it (if any) have something in common
download source
released 20 12 20
0.0.76
added --shadow.ignore to ignore files with specified extension
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released 20 12 13
0.0.75
added --microdata.root and --microdata.virtual for microdata exports
Ubuntu Server 20.10 amd64 build
default dedu cache now based on config file name
underlying work
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released 20 12 10
0.0.73
Export ‘repaired’ HTML files, including processing of Server Side Include directives;
Deduplicate non–HTML files. When used with export, it copies one version of the file and modifies links appropriately.
download source
released 20 12 5