feat(#9): docs

README.md

@@ -84,6 +84,26 @@ query ($searchQuery: String!, $first: Int, $after: String) {
 }
 ```
 
+### Parsing Schema
+
+To parse response generated by [GraphQL Query](#graphql-query), you should
+provide the parsing schema. This schema should have all desired metadata field
+names as keys and path to the data in response as values.
+
+For instance:
+
+```json
+{
+  "repo": "nameWithOwner",
+  "branch": "defaultBranchRef.name",
+  "readme": "defaultBranchRef.target.repository.object.text",
+  "topics": "repositoryTopics.edges[].node.topic.name",
+  "lastCommitDate": "defaultBranchRef.target.history.edges[0].node.committedDate",
+  "commits": "defaultBranchRef.target.history.totalCount",
+  "workflows": "object.entries.length"
+}
+```
+
 ## How to contribute
 
 Fork repository, make changes, send us a [pull request](https://www.yegor256.com/2014/04/15/github-guidelines.html).