diff --git a/include/doc_builders.hpp b/include/doc_builders.hpp
new file mode 100644
index 0000000..88ee211
--- /dev/null
+++ b/include/doc_builders.hpp
@@ -0,0 +1,14 @@
+#pragma once
+
+#include "doc_nodes.hpp"
+#include "tree_sitter_wrapper.hpp"
+
+#include <vector>
+
+namespace builders {
+
+nodes::SymbolDocs buildSymbolDocs(
+    parser::ParseTree::Node description_parser_node,
+    const std::vector<parser::ParseTree::Node> &annotation_parser_nodes);
+
+} // namespace builders
diff --git a/include/docs.hpp b/include/doc_nodes.hpp
similarity index 100%
rename from include/docs.hpp
rename to include/doc_nodes.hpp
diff --git a/include/statement_nodes.hpp b/include/statement_nodes.hpp
index 1bdaa58..f2b33e5 100644
--- a/include/statement_nodes.hpp
+++ b/include/statement_nodes.hpp
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "basic_nodes.hpp"
-#include "docs.hpp"
+#include "doc_nodes.hpp"
 #include "expression_nodes.hpp"
 #include "type_nodes.hpp"
 
diff --git a/include/tree_sitter_wrapper.hpp b/include/tree_sitter_wrapper.hpp
index 3480491..edc095f 100644
--- a/include/tree_sitter_wrapper.hpp
+++ b/include/tree_sitter_wrapper.hpp
@@ -16,63 +16,69 @@ public:
     Node(const TSNode &node, const std::string *source)
         : node_(node), source_(source) {}
 
-    std::string get_type() { return ts_node_type(node_); }
+    std::string get_type() const { return ts_node_type(node_); }
 
-    std::pair<size_t, size_t> get_start_point() {
+    std::pair<size_t, size_t> get_start_point() const {
       TSPoint point = ts_node_start_point(node_);
       return {point.row, point.column};
     }
 
-    std::pair<size_t, size_t> get_end_point() {
+    std::pair<size_t, size_t> get_end_point() const {
       TSPoint point = ts_node_end_point(node_);
       return {point.row, point.column};
     }
 
-    std::string get_as_sexpression() { return ts_node_string(node_); }
+    std::string get_as_sexpression() const { return ts_node_string(node_); }
 
-    std::string get_value() { // from source
+    std::string get_value() const { // from source
       size_t start = ts_node_start_byte(node_);
       size_t end = ts_node_end_byte(node_);
       return source_->substr(start, end - start);
     }
 
-    bool is_null() { return ts_node_is_null(node_); }
+    bool is_null() const { return ts_node_is_null(node_); }
 
-    bool is_named() { return ts_node_is_named(node_); }
+    bool is_named() const { return ts_node_is_named(node_); }
 
-    bool is_missing() { return ts_node_is_missing(node_); }
+    bool is_missing() const { return ts_node_is_missing(node_); }
 
-    bool is_extra() { // comments, etc.
+    bool is_extra() const { // comments, etc.
       return ts_node_is_extra(node_);
     }
 
-    bool has_error() { return ts_node_has_error(node_); }
+    bool has_error() const { return ts_node_has_error(node_); }
 
-    Node nth_child(size_t n) { return Node(ts_node_child(node_, n), source_); }
+    Node nth_child(size_t n) const {
+      return Node(ts_node_child(node_, n), source_);
+    }
 
-    size_t child_count() { return ts_node_child_count(node_); }
+    size_t child_count() const { return ts_node_child_count(node_); }
 
-    Node nth_named_child(size_t n) {
+    Node nth_named_child(size_t n) const {
       return Node(ts_node_named_child(node_, n), source_);
     }
-    size_t named_child_count() { return ts_node_named_child_count(node_); }
+    size_t named_child_count() const {
+      return ts_node_named_child_count(node_);
+    }
 
-    Node child_by_field_name(const std::string &name) {
+    Node child_by_field_name(const std::string &name) const {
       return Node(ts_node_child_by_field_name(node_, name.c_str(), name.size()),
                   source_);
     }
 
-    Node previous_sibling() {
+    Node previous_sibling() const {
       return Node(ts_node_prev_sibling(node_), source_);
     }
 
-    Node previous_named_sibling() {
+    Node previous_named_sibling() const {
       return Node(ts_node_prev_named_sibling(node_), source_);
     }
 
-    Node next_sibling() { return Node(ts_node_next_sibling(node_), source_); }
+    Node next_sibling() const {
+      return Node(ts_node_next_sibling(node_), source_);
+    }
 
-    Node next_named_dibling() {
+    Node next_named_sibling() const {
       return Node(ts_node_next_named_sibling(node_), source_);
     }
 
diff --git a/src/doc_builders.cpp b/src/doc_builders.cpp
new file mode 100644
index 0000000..1576121
--- /dev/null
+++ b/src/doc_builders.cpp
@@ -0,0 +1,36 @@
+#include "../include/doc_builders.hpp"
+#include "basic_builders.hpp"
+
+namespace builders {
+
+// TODO: check, that all annotations are exist in function definition
+nodes::SymbolDocs buildSymbolDocs(
+    parser::ParseTree::Node description_parser_node,
+    const std::vector<parser::ParseTree::Node> &annotation_parser_nodes) {
+  std::string description = description_parser_node.get_value();
+
+  // remove newline delimeters (": " at each new line
+  size_t j = 0;
+  for (size_t i = 0; i < description.size(); ++i, ++j) {
+    if (j != i) {
+      description[j] = description[i];
+    }
+
+    if (description[i] == '\n') {
+      i += 2;
+    }
+  }
+  description.resize(j);
+
+  nodes::SymbolDocs docs(description);
+
+  for (auto &annotation_parser_node : annotation_parser_nodes) {
+    docs.add_annotation_info(
+        buildAnnotation(annotation_parser_node.nth_child(0)),
+        annotation_parser_node.nth_child(1));
+  }
+
+  return docs;
+}
+
+} // namespace builders