Add extractor type READMEs

extractors/README.md

@@ -4,5 +4,5 @@ An extractor is a component which performs an operation of extracting data from
 The folder is structured according to extractor types:
 
 - [Extract external knowledge](extract-external-knowledge)
-- [Extract metadata](extract-metadata-descriptor) 
-- Extract content (empty at the moment)
+- [Extract metadata descriptor](extract-metadata-descriptor)
+- [Extract content descriptor](extract-content-descriptor) (empty at the moment)

extractors/extract-content-descriptor/README.md

@@ -0,0 +1,6 @@
+# Extract content descriptor
+*Extract content descriptor* represents a component performing
+
+<code><i>extract</i><sub><i>desc</i></sub>(DatasetSource,Metadata<sup>+</sup>): Descriptor<sup>+</sup></code>
+
+which extracts from a dataset source a descriptor for each dataset with a provided metadata descriptor.

extractors/extract-external-knowledge/README.md

@@ -1,2 +1,6 @@
-# Knowledge graph extractors
-Knowledge graph extractors are components, which ...
+# Extract external knowledge
+*Extract external knowledge* represents a component performing
+
+<code><i>extract</i><sub><i>k</i></sub>(KnowledgeSource): Knowledge<sup>*</sup></code>
+
+which extracts an external knowledge from a given external knowledge source.

extractors/extract-metadata-descriptor/README.md

@@ -1,2 +1,6 @@
-# Metadata extractors
-Metadata extractors are components, which ...
+# Extract metadata descriptor
+*Extract metadata descriptor* represents a component performing
+
+<code><i>extract</i><sub><i>meta</i></sub>(DataCatalogSource): Metadata<sup>+</sup></code>
+
+which extracts metadata about datasets from a given data catalog source.

presenters/README.md

@@ -3,4 +3,6 @@ A presenter is a component which uses the products of dataset similarity pipelin
 
 The folder is structured according to presenter types:
 
-(Empty)
+- [Similarity evaluation](similarity-evaluation) (empty at the moment)
+- [Similarity explanation](similarity-explanation) (empty at the moment)
+- [Similarity search](similarity-search) (empty at the moment)

processors/README.md

@@ -3,8 +3,8 @@ A processor is a component which performs an operaton for processing input entit
 
 The folder is structured according to processor types:
 - [Refine descriptor](refine-descriptor)
-- Refine external knowledge (empty at the moment)
+- [Refine external knowledge](refine-external-knowledge) (empty at the moment)
 - [Refine mapping](refine-mapping)
 - [Compute similarities](compute-similarities)
-- Multimodal fusion (empty at the moment)
+- [Fuse similarities](fuse-similarities) (empty at the moment)
 - [Map dataset to knowledge](map-dataset-to-knowledge)