⚡ Semantic Markup in Slovakia

Semantic markup is code added to web pages to describe the meaning of content elements and their relationships, giving search engines and other systems clearer context beyond visual layout.

Slovakia is a Central European country with a population of around 5.4 million people.

According to our research, semantic markup technologies are used on 74.9% of websites from Slovakia.

⭐ Most Popular in 2026

The following chart shows the top semantic markup technologies in Slovakia in 2026, based on market share.

The most popular is ARIA with an impressive share of 85.1%, followed by Open Graph with 73.5% and JSON-LD with 43.5%.

ARIA 85.1%
Open Graph 73.5%
JSON-LD 43.5%
Twitter Cards 37.4%
SearchAction 32.2%
oEmbed 28.3%
Microdata 20.4%
Dublin Core 4.9%
Microformats 3.4%
RDFa 1.5%
GoodRelations 0.1%
Microformats2 0.08%

🚀 Highlights

Here is a list of the top technologies that are more popular in Slovakia than worldwide.
Differences between global and country rankings are shown in parentheses.

3. JSON-LD ^(-1)
5. SearchAction ^(-1)
8. Dublin Core ^(-1)
11. GoodRelations ^(-2)

✨ Best Semantic Markup Technologies

Below is a more detailed list of 12 semantic markup technologies used on sites from Slovakia, ranked by their market share.

Rank	Name	Market share
1	ARIA Cambridge, Massachusetts, United States A W3C technical specification that defines how to improve the accessibility of web content and applications, particularly those with dynamic interfaces and custom controls.	85.1%
2	Open Graph Menlo Park, California, United States Enables any web page to become a rich object in a social graph.	73.5%
3	JSON-LD Cambridge, Massachusetts, United States A lightweight linked data format used to embed structured data into web pages.	43.5%
4	Twitter Cards Bastrop, Texas, United States With Twitter Cards, you can attach rich photos, videos and media experiences to tweets, helping to drive traffic to your website.	37.4%
5	SearchAction Cambridge, Massachusetts, United States A structured data type from Schema.org that describes a website's search capability.	32.2%
6	oEmbed A format for allowing an embedded representation of a URL on third party sites.	28.3%
7	Microdata Cambridge, Massachusetts, United States An HTML specification that is used to nest metadata within a document, in parallel with the existing content.	20.4%
8	Dublin Core A metadata element set used for documents and other objects.	4.9%
9	Microformats A set of defined HTML classes and attributes created to serve as descriptive metadata about an element, representing commonly published things like people, events, blog posts, reviews, and so on.	3.4%
10	RDFa Cambridge, Massachusetts, United States An extension to HTML5 that adds attributes to markup things like people, places, events, recipes, and reviews.	1.5%
11	GoodRelations A standardized vocabulary for product, price, store, and company data that can be embedded into web pages.	0.1%
12	Microformats2 A set of defined HTML classes and attributes created to serve as descriptive metadata about an element, representing commonly published things like people, events, blog posts, reviews, and so on.	0.08%

👉 See Also

✨ Related Technologies
- WCAG
🌎 Semantic Markup in other countries

Data is based on the analysis of 9,650 websites from Slovakia.
Statistics were last calculated on March 21, 2026.
For details, see our methodology and disclaimer.