Relaxng.org - SEO Checker

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Overview of the SEO Check
Meta information
68% 
Page quality
83% 
Page structure
98% 
Link structure
73% 
Server
100% 
External factors
100% 
SEO Score
Response time
0.23 s
File size
24.80 kB
Words
2201
Media files
0
Number of links
28 internal / 99 external

Task list of SEO Improvements

Meta specifications

Title
(Critically important)
RELAX NG home page
The length of the page title is perfect. (207 pixels out of 580 max pixel length)
There are no duplicate words in the title
Meta description
(Critically important)
The meta description is missing.
Crawlability
(Critically important)
There are no problems in accessing the website.
Canonical URL
(Important)
No canonical link is specified.
Language
(Somewhat important)
Language detected in text: en
Server location: United States of America
The language is not specified in the HTML markup.
Alternate/Hreflang Links
(Somewhat important)
There are no alternate links specified on this page.
Other meta tags
(Somewhat important)
There is no rel next meta tag on this page.
There is no rel prev meta tag on this page.
Domain
(Somewhat important)
The domain is no subdomain.
The domain length is good.
The domain does not contain non-latin characters.
Page URL
(Somewhat important)
No parameters were found in the URL.
No session ID was found in the URL.
The URL does not have too many subdirectories.
Charset encoding
(Somewhat important)
The charset encoding (UTF-8) is set correctly.
Doctype
(Nice to have)
No doctype markup was found.
Favicon
(Nice to have)
No favicon is linked in the HTML code.

Meta tags

No meta tags were found.

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Page quality

Content
(Critically important)
This page contains 2201 words. That's ok.
27% of the text are stop words.
Keywords used in the page title are also used in the page content. That's good!
Words from the H1 heading are used in the page content.
The page contains a listing, which indicates a good text layout.
47 paragraphs were found on this page.
The text content is perfect.
No placeholders texts or images were found.
There are no duplicates on the site.
The average number of words per sentence of 10.62 words is good.
Frames
(Critically important)
This page does not use a frameset.
Mobile optimization
(Somewhat important)
No viewpoint tag is provided.
No Apple touch icon is specified.
Bold and strong tags
(Somewhat important)
The usage of strong and bold tags is perfect. We recommend the use of up to 44 tags for this page.
Image SEO
(Somewhat important)
Alt text (alternative text) is correctly used on all found images.
Social Networks
(Nice to have)
There are only a few social sharing widgets on the page. Make your website popular in social networks with social sharing widgets.
Additional markup
(Nice to have)
No additional page markup was found.
HTTPS
(Somewhat important)
This website uses HTTPS to protect privacy and integrity of the exchanged data.
All included files are also transferred via HTTPS.

Media list

No media files were found.

Page structure

H1 heading
(Critically important)
RELAX NG home page
The H1 heading is too short (18 characters). It should be at least 20 Characters long.
Headings
(Important)
The heading structure is perfect.

Heading structure

Heading levelContent
H1 RELAX NG home page
H2 Contents
H2 Introduction
H2 Documents
H2 Software
H2 Schemas
H2 Test suites
H2 Other RELAX NG pages
H3 Tutorials
H3 Specifications
H3 Books
H3 Other documents
H3 Validators
H3 Conversion tools
H3 Code generators
H3 XML editors
H3 Other software
Some anchor texts are used more than once.
The number of internal links is ok.
None of the anchor texts is too long.
All internal links are not using dynamic parameters.
There are too many external links (99) on this page.

Found links on this page

LinkAttributesAnchor text
https://relaxng.org/Anchor Introduction
https://relaxng.org/Anchor Documents
https://relaxng.org/Anchor Tutorials
https://relaxng.org/Anchor Specifications
https://relaxng.org/Anchor Books
https://relaxng.org/Anchor Other documents
https://relaxng.org/Anchor Mailing lists
https://relaxng.org/Anchor Software
https://relaxng.org/Anchor Validators
https://relaxng.org/Anchor Conversion tools
https://relaxng.org/Anchor Code generators
https://relaxng.org/Anchor XML Editors
https://relaxng.org/Anchor Other software
https://relaxng.org/Anchor Schemas
https://relaxng.org/Anchor Test suites
https://relaxng.org/Anchor Other RELAX NG pages
http://www.oasis-open.org/External Subdomain OASIS
http://www.oasis-open.org/comm...External Subdomain RELAX NG Technical Committeee
http://www.dsdl.org/External Subdomain DSDL
http://www.itscj.ipsj.or.jp/sc34/External Subdomain ISO/IEC JTC1/SC34/WG1
http://www.thaiopensource.com/...External Subdomain TREX
http://www.xml.gr.jp/relax/External Subdomain RELAX Core
/tutorial-20011203.htmlRELAX NG Tutorial
/tutorial-20011203-errata.htmlerrata
/tutorial-20030326.htmlWorking Draft, 26 March 2003
/compact-tutorial-20030326.htmlRELAX NG Compact Syntax Tutorial
/spec-20011203.htmlRELAX NG Specification
/spec-20011203-errata.htmlText duplicate errata
http://standards.iso.org/ittf/...External Subdomain ISO/IEC 19757-2:2003 Document Schema Definition Language (DSDL) -- Part 2: Regular-grammar-based validation -- RELAX NG
/compact-20021121.htmlRELAX NG Compact Syntax
http://standards.iso.org/ittf/...External Subdomain ISO/IEC 19757-2:Amd1 Document Schema Definition Language (DSDL) -- Part 2: Regular-grammar-based validation -- RELAX NG -- Amendment 1: Compact Syntax
http://standards.iso.org/ittf/...External Subdomain ISO/IEC 19757-2:2008 Document Schema Definition Language (DSDL) -- Part 2: Regular-grammar-based validation -- RELAX NG
/compatibility-20011203.htmlRELAX NG DTD Compatibility
/xsd-20010907.htmlGuidelines for using W3C XML Schema Datatypes with RELAX NG
http://books.xmlschemata.org/r...External Subdomain RELAX NG
https://web.archive.org/web/20...External Subdomain Part 1
https://web.archive.org/web/20...External Subdomain Part 2
https://web.archive.org/web/20...External Subdomain Part 3
https://www.xml.com/pub/a/2002...External Subdomain Relax NG, Compared
http://www.xml.com/pub/a/2002/...External Subdomain RELAX NG's Compact Syntax
http://www.xmlhack.com/read.ph...External Subdomain XML and the IETF: Making the case for RELAX NG
/jclark/design.htmlThe Design of RELAX NG
http://zvon.org/xxl/RelaxNG/Ou...External ZVON RELAX Reference
/jclark/implement.htmlNotes on implementing RELAX NG
https://github.com/relaxng/jin...External Jing
http://www.davidashen.net/rnv....External Subdomain RNV
http://www.xmlsoft.org/External Subdomain Libxml2
https://msv.dev.java.net/External Subdomain MSV
http://www.kohsuke.org/relaxng...External Subdomain Bali
http://sourceforge.net/project...External Tenuto
https://downloads.xmlschemata....External Subdomain XVIF
https://github.com/mono/mono/b...External RelaxngValidatingReader
https://www.mono-project.com/External Subdomain Mono
http://validator.nu/External On-line validator.
https://people.apache.org/~and...External Subdomain ManekiNeko
https://xmlark.github.io/msv/r...External Subdomain Sun MSV Schematron add-on
https://www.schematron.com/External Subdomain Schematron
http://www.topologi.com/produc...External Subdomain Topologi XML Judge
https://github.com/relaxng/jin...External Trang
https://xmlark.github.io/msv/External Subdomain Sun RELAX NG Converter
http://debeissat.nicolas.free....External Subdomain XSD to RelaxNG
http://www.xmloperator.net/i2s/External Subdomain InstanceToSchema
http://www.kohsuke.org/relaxng...External Subdomain rng2srng
https://people.apache.org/~and...External Subdomain NekoDTD
https://github.com/djc/rnc2rngExternal rnc2rng
http://debeissat.nicolas.free....External Subdomain Simplification of RelaxNG schemas
http://downloads.xmlschemata.o...External Subdomain XSLT stylesheet
http://www.relaxer.org/External Subdomain Relaxer
http://relaxngcc.sourceforge.net/External Subdomain RelaxNGCC
http://www.stylusstudio.com/External Subdomain Stylus Studio
http://firedocs.org/External Firedocs
http://www.xmloperator.net/External Subdomain xmloperator
http://www.topologi.com/produc...External Subdomain Topologi Collaborative Markup Editor
http://www.oxygenxml.com/External Subdomain <oXygen/>
http://www.xmlblueprint.com/External Subdomain XMLBlueprint XML Editor
http://www.xmlbuddy.com/External Subdomain XMLBuddy Pro
http://www.mediafusion.co.jp/d...External Subdomain RNGEdit
http://www.thaiopensource.com/...External Subdomain nXML mode
http://www.pantor.com/download...External Subdomain RNC Emacs Mode
http://www.pantor.com/download...External Subdomain RNC SAX Parser
http://www.vim.org/scripts/scr...External Subdomain RNC Vim syntax definition
http://www.vim.org/External Subdomain Vim
http://sourceforge.net/project...External RELAX NG datatype interface
http://wwws.sun.com/software/x...External Subdomain Sun XML datatypes library
http://wwws.sun.com/software/x...External Subdomain Sun XML Instance Generator
http://www.kohsuke.org/relaxng...External Subdomain RelaxMeter
http://downloads.xmlschemata.o...External Subdomain Schema simplifier in XSLT
http://ftp.davidashen.net/ince...External Subdomain incelim
https://rngom.dev.java.net/non...External Subdomain RELAX NG Object Model
http://debeissat.nicolas.free....External Subdomain Schema to web form
http://www.sharexml.com/x/get?...External Subdomain XSLT 3.0
http://citationstyles.org/External Citation Style Language (CSL)
https://github.com/citation-st...External RELAX NG schemas
http://www.ietf.org/rfc/rfc428...External Subdomain Atom Syndication Format
http://code.google.com/apis/ca...External Subdomain Calendar List Feed Schema
http://www.adobe.com/devnet/in...External Subdomain Adobe InDesign IDML
http://www.openebook.org/2007/...External Subdomain Open Publication Structure
http://www.openebook.org/2007/...External Subdomain Open Packaging Format
http://www.idpf.org/ocf/ocf1.0...External Subdomain Open Container Format
https://relaxng.org/relaxng.rngRELAX NG 1.0
http://tei.oucs.ox.ac.uk/P5/Gu...External Subdomain TEI P5
http://www.oasis-open.org/docb...External Subdomain DocBook
http://www.thaiopensource.com/...External Subdomain XHTML
http://www.thaiopensource.com/...External Subdomain XSLT 1.0
http://yupotan.sppd.ne.jp/rela...External Subdomain SMBmeta 0.1 on RELAX-NG
http://yupotan.sppd.ne.jp/rela...External Subdomain P3P 1.0 on RELAX-NG
http://yupotan.sppd.ne.jp/rela...External Subdomain MathML 2.0 on RELAX-NG
http://yupotan.sppd.ne.jp/rela...External Subdomain SVG 1.1 on RELAX-NG
http://www.jenitennison.com/sc...External Subdomain W3C XML Schema
http://github.com/pabigot/rng4xsdExternal update
http://www.kohsuke.org/relaxng...External Subdomain VoiceXML
http://www.w3.org/Signature/20...External Subdomain XML-DSig
http://www.w3.org/Encryption/2...External Subdomain XENC
http://www.w3.org/TR/2003/WD-r...External Subdomain RDF
http://lists.xml.org/archives/...External Subdomain IBTWSH
http://www.oasis-open.org/comm...External Subdomain ODF
http://www.ecma-international....External Subdomain OOXML
http://www.ecma-international....External Subdomain 1
http://www.ecma-international....External Subdomain No Text
http://www.ecma-international....External Subdomain 2
http://www.ecma-international....External Subdomain 4
http://thaiopensource.com/rela...External Test suite
http://www.oasis-open.org/comm...External Subdomain OASIS RELAX NG TC home page
http://xml.coverpages.org/rela...External Subdomain Robin Cover's RELAX NG page
http://www.thaiopensource.com/...External Subdomain James Clark's RELAX NG page
http://www.kohsuke.org/relaxng/External Subdomain Kohsuke KAWAGUCHI's RELAX NG page
http://yupotan.sppd.ne.jp/rela...External Subdomain Yutaka Furubayashi's RELAX NG page

Server configuration

HTTP redirects
(Critically important)
This page redirects to "https://relaxng.org/"
HTTP header
(Important)
No X-Powered HTTP header is sent.
The web server transmits the web page (HTML) in compressed form.
Performance
(Somewhat important)
The page response time is excellent with 0.23 seconds.
The file size of the HTML document is fine (25 kB).

HTTP Response Header

NameValue
serverGitHub.com
content-typetext/html; charset=utf-8
last-modifiedMon, 19 Jun 2023 12:44:44 GMT
access-control-allow-origin*
etagW/"64904dbc-631f"
expiresSun, 01 Jun 2025 10:17:13 GMT
cache-controlmax-age=600
content-encodinggzip
x-proxy-cacheMISS
x-github-request-idAC6F:386581:1369A2C:139784B:683C2650
accept-rangesbytes
age0
dateSun, 01 Jun 2025 11:37:39 GMT
via1.1 varnish
x-served-bycache-fra-eddf8230116-FRA
x-cacheHIT
x-cache-hits0
x-timerS1748777859.335634,VS0,VE100
varyAccept-Encoding
x-fastly-request-ide93f682227fd0099c8e8338a51c9fcc3f4f1f10e
content-length8034
statuscode200
http_versionHTTP/2

External factors

This page is referenced by wikipedia.
This website has excellent links from other websites.
This page has backlinks from 171 referring domains.
This page has 361 backlinks.
This page has backlinks from 141 different ip addresses.

Links from Wikipedia

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Robots.txt

No valid Robots.txt file was found.

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relaxng.org
RELAX NG home page

Most important keywords

Following keywords were found. You can check the keyword optimization of this page for each keyword.

KeywordResultRecheck
RELAX77%Check
RELAX NG77%Check
RELAX NG page73%Check
page66%Check
RELAX NG schema66%Check
RELAX NG Compact66%Check
RELAX NG Specification66%Check
RELAX NG Version66%Check
RELAX NG using66%Check
validation RELAX NG66%Check
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