Fix broken links

docs/apis/graph-api/getting-a-single-entity.md

@@ -14,11 +14,11 @@ You can retrieve the data of a single entity by providing the entity's OpenAIRE
 The OpenAIRE id is the primary key of an entity in the OpenAIRE Graph.
 
 :::note
-Note that if you want to retrieve multiple entities based on their OpenAIRE ids, you can use the [search endpoints and filter](./searching-entities/filtering-search-results#or-operator) by the `id` field using `OR`. 
+Note that if you want to retrieve multiple entities based on their OpenAIRE ids, you can use the [search endpoints and filter](./searching-entities/filtering-search-results.md#or-operator) by the `id` field using `OR`. 
 :::
 
 ## Response
-The response of the Graph API is a [Research product](../../data-model/entities/research-product), [Organization](../../data-model/entities/organization), [Data Source](../../data-model/entities/data-source), or [Project](../../data-model/entities/project), depending on the endpoint used.
+The response of the Graph API is a [Research product](../../data-model/entities/research-product.md), [Organization](../../data-model/entities/organization.md), [Data Source](../../data-model/entities/data-source.md), or [Project](../../data-model/entities/project.md), depending on the endpoint used.
 
 ## Example
 

docs/apis/graph-api/graph-api.md

@@ -16,16 +16,16 @@ You can access the API Swagger documentation in [https://api-beta.openaire.eu/gr
 ## Notes
 Please note that the Graph API: 
 
-- is intended for data discovery and exploration; if you are interested in downloading the full OpenAIRE Graph dataset, please navigate [here](../../downloads/full-graph).
+- is intended for data discovery and exploration; if you are interested in downloading the full OpenAIRE Graph dataset, please navigate [here](../../downloads/full-graph.md).
 - adhers to the [terms of use](../terms.md) of the OpenAIRE public APIs - certain (rate limit) restrictions apply.
 
 ## Learn more
 
 Please use the following links to learn more about the Graph API:
 
-- [Getting a single entity](./getting-a-single-entity) - Retrieve detailed information on a single entity.
-- [Searching entities](./searching-entities/overview) - Retrieve a list of entities based on specific search criteria.
-    - [Filtering results](./searching-entities/filtering-search-results) - Filter search results based on specific criteria.
-    - [Sorting results](./searching-entities/sorting-and-paging#sorting) - Sort search results based on specific criteria.
-    - [Paging](./searching-entities/sorting-and-paging#paging) - Retrieve a subset of search results. 
-- [Making requests](./making-requests) - Learn how to make requests with different programming languages.
+- [Getting a single entity](./getting-a-single-entity.md) - Retrieve detailed information on a single entity.
+- [Searching entities](./searching-entities/searching-entities.md) - Retrieve a list of entities based on specific search criteria.
+    - [Filtering results](./searching-entities/filtering-search-results.md) - Filter search results based on specific criteria.
+    - [Sorting results](./searching-entities/sorting-and-paging.md#sorting) - Sort search results based on specific criteria.
+    - [Paging](./searching-entities/sorting-and-paging.md#paging) - Retrieve a subset of search results. 
+- [Making requests](./making-requests.md) - Learn how to make requests with different programming languages.

docs/apis/graph-api/searching-entities/filtering-search-results.md

@@ -1,7 +1,7 @@
 # Filtering search results
 
 Filters can be used to narrow down the search results based on specific criteria. 
-Filters are provided as query parameters in the request URL (see [here](./overview#endpoints) for the available search entpoints). 
+Filters are provided as query parameters in the request URL (see [here](./searching-entities.md) for the available search entpoints). 
 
 Multiple filters can be provided in a single request; they should be formatted as follows:
 `param1=value1&param2=value2&...&paramN=valueN`.

docs/apis/graph-api/searching-entities/searching-entities.md

@@ -11,8 +11,8 @@ Currently, the Graph API supports the following entity types:
 * Projects - endpoint: [`GET /projects`](https://api-beta.openaire.eu/graph/projects)
 
 Each of these endpoints can be used to list all entities of the corresponding type.
-Listing such entities can be more useful when using the [filtering](./filtering-search-results), 
-[sorting](./sorting-and-paging#sorting), and [paging](./sorting-and-paging#paging) capabilities of the Graph API.
+Listing such entities can be more useful when using the [filtering](./filtering-search-results.md), 
+[sorting](./sorting-and-paging.md#sorting), and [paging](./sorting-and-paging.md#paging) capabilities of the Graph API.
 
 ## Response
 
@@ -41,4 +41,4 @@ It contains a `header` object with the following fields:
 - `page`: the current page of the search results
 - `pageSize`: the number of entities per page
 
-Finally, the `results` field contains an array of entities of the corresponding type (i.e., [Research product](../../../data-model/entities/research-product), [Organization](../../../data-model/entities/organization), [Data Source](../../../data-model/entities/data-source), or [Project](../../../data-model/entities/project)).
+Finally, the `results` field contains an array of entities of the corresponding type (i.e., [Research product](../../../data-model/entities/research-product.md), [Organization](../../../data-model/entities/organization.md), [Data Source](../../../data-model/entities/data-source.md), or [Project](../../../data-model/entities/project.md)).

docs/apis/graph-api/searching-entities/sorting-and-paging.md

@@ -9,7 +9,7 @@ Sorting is achieved using the `sortBy` parameter, which specifies the field and
 
 * `sortBy`: Defines the field and the sort direction. The format should be `fieldname sortDirection`, where the `sortDirection` can be either `ASC` for ascending order or `DESC` for descending order.
 
-The field names that can be used for sorting are specific to each entity type and can be found in the `sortBy` field values of the [available paremeters](../searching-entities/filtering-search-results#available-parameters).
+The field names that can be used for sorting are specific to each entity type and can be found in the `sortBy` field values of the [available paremeters](../searching-entities/filtering-search-results.md#available-parameters).
 
 Note that the default sorting is based on the `relevance` score of the search results.
 

docs/apis/home.md

@@ -1,7 +1,7 @@
 # Public APIs
 
 The OpenAIRE Graph data are accessible through various public APIs. More specifically, the following APIs are currently provided:
-* [Graph API](./graph-api/overview) - an API to explore the OpenAIRE Graph
+* [Graph API](./graph-api/graph-api.md) - an API to explore the OpenAIRE Graph
 * [Search API](./search-api/search-api.md) - an API to search for research products and projects
 * [ScholeXplorer API](https://api.scholexplorer.openaire.eu/swagger-ui/index.html?urls.primaryName=Scholexplorer%20API%20V2.0) - an API offering dataset-publication & dataset-dataset links
 * [DSpace & EPrints API](./dspace-eprints-api.md) - an API to offer custom access to metadata for projects funded by a selection of international funders for DSpace and EPrints platforms

sidebars.js

@@ -61,13 +61,13 @@ const sidebars = {
         {
           type: 'category', 
           label: "Graph API",
-          link: { type: 'doc', id: 'apis/graph-api/overview' },
+          link: { type: 'doc', id: 'apis/graph-api/graph-api' },
           items: [
             { type: 'doc', id: 'apis/graph-api/getting-a-single-entity' },
             {
               type: 'category',
                 label: "Searching entities",
-                link: { type: 'doc', id: 'apis/graph-api/searching-entities/overview' },
+                link: { type: 'doc', id: 'apis/graph-api/searching-entities/searching-entities' },
                 items: [
                   { type: 'doc', id: 'apis/graph-api/searching-entities/filtering-search-results' },
                   { type: 'doc', id: 'apis/graph-api/searching-entities/sorting-and-paging' },