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1 von 12
1
2
• Für manche Graphen kann es sinnvoll sein sie direkt lesbar machen
• Aufwändig bei komplexen Graphen
• Alternativtext kann sinnvollere Option sein
Lesbare Graphen für Screenreader
3
<figure>
<figcaption>Preferred Operating System</figcaption>
<ul>
<li class="percent-50"><span>Windows
(100)</span></li>
<li class="percent-30"><span>Mac (60)</span></li>
<li class="percent-20"><span>Linux (40)</span></li>
</ul>
</figure>
CSS:
http://www.ashleysheridan.co.uk/blog/Accessible+Graphs+
and+Charts
Gut für einfache Graphen
4
Für komplexe Graphen
Beispiel
5
Bieten von Haus aus Barrierefreiheit
https://www.highcharts.com/accessibility/#exploreFeatures
6
• Infografiken müssen von allen Nutzern verstanden werden
• Es wird eine textuelle Beschreibung benötigt
• Alt Tag ist für lange Inhalte ungeeignet
• Es beschreibt KURZ was zu sehen ist
• Bsp: „Balkendiagramm über die monatlichen Besucher im ersten und zweiten Quartal 2020“
• Lange Beschreibung für Informationen der Infografik
• Textuelle Darstellung der wichtigen Informationen und Trends
• Datentabellen können ebenfalls die Informationen liefern
• Können zusätzlich oder statt Text verwendet werden
• W3C
Alternativtext
7
<figure role="group">
<img src="chart.png"
alt="Bar chart showing monthly and total visitors
for the first quarter 2014 for sites 1 to 3, described
in detail below.">
<figcaption>
<h2>Summary of Trends</h2>
<p>…</p>
</figcaption>
</figure>
Versteckt mit aria-describedby und aria-hidden
Optional: Versteckt (nur für Screenreader)
8
<p>
<img
src="chart.png"
alt="Bar chart showing monthly and total visitors
for the first quarter 2014 for sites 1 to 3. Described
under the heading Summary of Trends.">
</p>
[…]
<h4>Summary of Trends</h4>
[…]
9
10
11
<p>
<img
src="chart.png"
alt="Bar chart showing monthly and total visitors
for the first quarter 2014 for sites 1 to 3">
<br>
<a href="2014-first-qtr.html">Example.com Site
visitors Jan to March 2014 text description of the bar
chart</a>
</p>
<figure role="group">
<img
src="chart.png"
alt="Bar chart showing monthly and total
visitors for the first quarter 2014 for sites 1 to 3">
<figcaption>
<a href="2014-first-qtr.html">Example.com Site
visitors Jan to March 2014 text description of the bar
chart</a>
</figcaption>
</figure>
<figure> ist HTML5
abwärtskompatibel durch role=“group”
12

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Barrierefreie Diagramme

  • 1. 1
  • 2. 2 • Für manche Graphen kann es sinnvoll sein sie direkt lesbar machen • Aufwändig bei komplexen Graphen • Alternativtext kann sinnvollere Option sein Lesbare Graphen für Screenreader
  • 3. 3 <figure> <figcaption>Preferred Operating System</figcaption> <ul> <li class="percent-50"><span>Windows (100)</span></li> <li class="percent-30"><span>Mac (60)</span></li> <li class="percent-20"><span>Linux (40)</span></li> </ul> </figure> CSS: http://www.ashleysheridan.co.uk/blog/Accessible+Graphs+ and+Charts Gut für einfache Graphen
  • 5. 5 Bieten von Haus aus Barrierefreiheit https://www.highcharts.com/accessibility/#exploreFeatures
  • 6. 6 • Infografiken müssen von allen Nutzern verstanden werden • Es wird eine textuelle Beschreibung benötigt • Alt Tag ist für lange Inhalte ungeeignet • Es beschreibt KURZ was zu sehen ist • Bsp: „Balkendiagramm über die monatlichen Besucher im ersten und zweiten Quartal 2020“ • Lange Beschreibung für Informationen der Infografik • Textuelle Darstellung der wichtigen Informationen und Trends • Datentabellen können ebenfalls die Informationen liefern • Können zusätzlich oder statt Text verwendet werden • W3C Alternativtext
  • 7. 7 <figure role="group"> <img src="chart.png" alt="Bar chart showing monthly and total visitors for the first quarter 2014 for sites 1 to 3, described in detail below."> <figcaption> <h2>Summary of Trends</h2> <p>…</p> </figcaption> </figure> Versteckt mit aria-describedby und aria-hidden Optional: Versteckt (nur für Screenreader)
  • 8. 8 <p> <img src="chart.png" alt="Bar chart showing monthly and total visitors for the first quarter 2014 for sites 1 to 3. Described under the heading Summary of Trends."> </p> […] <h4>Summary of Trends</h4> […]
  • 9. 9
  • 10. 10
  • 11. 11 <p> <img src="chart.png" alt="Bar chart showing monthly and total visitors for the first quarter 2014 for sites 1 to 3"> <br> <a href="2014-first-qtr.html">Example.com Site visitors Jan to March 2014 text description of the bar chart</a> </p> <figure role="group"> <img src="chart.png" alt="Bar chart showing monthly and total visitors for the first quarter 2014 for sites 1 to 3"> <figcaption> <a href="2014-first-qtr.html">Example.com Site visitors Jan to March 2014 text description of the bar chart</a> </figcaption> </figure> <figure> ist HTML5 abwärtskompatibel durch role=“group”
  • 12. 12