diff --git a/LPT/readme.md b/LPT/readme.md
index 31f96a707..7439569f8 100644
--- a/LPT/readme.md
+++ b/LPT/readme.md
@@ -9,7 +9,7 @@ LPT Classification:
 * Thesaurus <https://w3id.org/LPT/Thesaurus>
 
 Contacts: 
-* Our Github address https://github.com/DACE-DL
+* Our Github address [DACE-DL](https://github.com/DACE-DL)
 * Raphaël Conde Salazar <rcondesalazar@free.fr>
 * Clément Jonquet <clement.jonquet@inrae.fr>
 * Danai Symeonidou <danai.symeonidou@inrae.fr>
diff --git a/lpto/.htaccess b/lpto/.htaccess
new file mode 100644
index 000000000..67d3d15d1
--- /dev/null
+++ b/lpto/.htaccess
@@ -0,0 +1,74 @@
+# Turn off MultiViews 
+Options -MultiViews
+
+# Directive to ensure *.rdf files served as appropriate content type,
+# if not present in main apache config
+AddType application/rdf+xml .rdf
+AddType application/rdf+xml .owl
+AddType text/turtle .ttl
+AddType application/n-triples .n3
+AddType application/ld+json .json
+
+RewriteEngine on
+
+# Rewrite rule for latest version.
+RewriteCond %{HTTP_ACCEPT} !application/rdf\+xml.*(text/html|application/xhtml\+xml)
+RewriteCond %{HTTP_ACCEPT} text/html [OR]
+RewriteCond %{HTTP_ACCEPT} application/xhtml\+xml [OR]
+RewriteCond %{HTTP_USER_AGENT} ^Mozilla/.*
+RewriteRule ^$ https://lptontology.github.io/index-en.html [R=303,L]
+
+# Rewrite rule to serve JSON-LD content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} application/ld\+json
+RewriteRule ^$ https://lptontology.github.io/ontology.json [R=303,L]
+
+# Rewrite rule to serve RDF/XML content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} \*/\* [OR]
+RewriteCond %{HTTP_ACCEPT} application/rdf\+xml
+RewriteRule ^$ https://lptontology.github.io/ontology.xml [R=303,L]
+
+# Rewrite rule to serve N-Triples content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} application/n-triples
+RewriteRule ^$ https://lptontology.github.io/ontology.nt [R=303,L]
+
+# Rewrite rule to serve TTL content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} text/turtle [OR]
+RewriteCond %{HTTP_ACCEPT} text/\* [OR]
+RewriteCond %{HTTP_ACCEPT} \*/turtle 
+RewriteRule ^$ https://lptontology.github.io/ontology.ttl [R=303,L]
+
+
+# Rewrite rules for any other version.
+RewriteCond %{HTTP_ACCEPT} !application/rdf\+xml.*(text/html|application/xhtml\+xml)
+RewriteCond %{HTTP_ACCEPT} text/html [OR]
+RewriteCond %{HTTP_ACCEPT} application/xhtml\+xml [OR]
+RewriteCond %{HTTP_USER_AGENT} ^Mozilla/.*
+RewriteRule ^(.+)$ https://lptontology.github.io/$1/index-en.html [R=303,L]
+
+# Rewrite rule to serve JSON-LD content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} application/ld\+json
+RewriteRule ^(.+)$ https://lptontology.github.io/$1/ontology.json [R=303,L]
+
+# Rewrite rule to serve RDF/XML content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} \*/\* [OR]
+RewriteCond %{HTTP_ACCEPT} application/rdf\+xml
+RewriteRule ^(.+)$ https://lptontology.github.io/$1/ontology.xml [R=303,L]
+
+# Rewrite rule to serve N-Triples content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} application/n-triples
+RewriteRule ^(.+)$ https://lptontology.github.io/$1/ontology.nt [R=303,L]
+
+# Rewrite rule to serve TTL content from the vocabulary URI if requested
+RewriteCond %{HTTP_ACCEPT} text/turtle [OR]
+RewriteCond %{HTTP_ACCEPT} text/\* [OR]
+RewriteCond %{HTTP_ACCEPT} \*/turtle 
+RewriteRule ^(.+)$ https://lptontology.github.io/$1/ontology.ttl [R=303,L]
+
+
+
+RewriteCond %{HTTP_ACCEPT} .+
+RewriteRule ^(.*)$ https://lptontology.github.io/406.html [R=406,L]
+# Default response
+# ---------------------------
+# Rewrite rule to serve the RDF/XML content from the vocabulary URI by default
+RewriteRule ^$ https://lptontology.github.io/ontology.xml [R=303,L]
diff --git a/lpto/README.md b/lpto/README.md
new file mode 100644
index 000000000..b1817679a
--- /dev/null
+++ b/lpto/README.md
@@ -0,0 +1,28 @@
+# LPTO: Ontology of linking problem types. 
+==========================================
+
+# Description and publication 
+
+This project consists in building an ontology of the different types of problems that can be encountered in a data linking process.  
+
+
+## Persistent URI 
+https://w3id.org/lpto is a persistent URI namespace for **Ontology of linking problem types (LPTO)** Ontology resources.
+
+
+## License
+The LPTO vocabulary is licensed under Creative Commons 4.0 International. 
+
+## Contacts
+
+* Our Github address [LPTOntology](https://github.com/LPTOntology)
+
+**Raphaël Conde Salazar (University of Montpellier)**    
+[DACE-DL](https://github.com/DACE-DL)
+<raphael.condesalazar@free.fr>
+
+**Clément Jonquet (University of Montpellier)**  
+<jonquet@lirmm.fr>  
+
+**Danai Symeonidou (University of Montpellier)**  
+<danai.symeonidou@inrae.fr>  
\ No newline at end of file