diff --git a/src/ClassSpec.ts b/src/ClassSpec.ts
index eb7bf4b..c7d1930 100644
--- a/src/ClassSpec.ts
+++ b/src/ClassSpec.ts
@@ -5,8 +5,9 @@ import * as ts from 'typescript';
 import * as readts from './readts';
 
 export class ClassSpec {
-	constructor(name: string, doc: string) {
+	constructor(name: string, symbol: ts.Symbol, doc: string) {
 		this.name = name;
+		this.symbol = symbol;
 		if(doc) this.doc = doc;
 	}
 
@@ -29,6 +30,7 @@ export class ClassSpec {
 	}
 
 	name: string;
+	symbol: ts.Symbol;
 	construct: readts.FunctionSpec;
 	methodList: readts.FunctionSpec[];
 	propertyList: readts.IdentifierSpec[];
diff --git a/src/IdentifierSpec.ts b/src/IdentifierSpec.ts
index 3c44062..0d16fbf 100644
--- a/src/IdentifierSpec.ts
+++ b/src/IdentifierSpec.ts
@@ -2,11 +2,12 @@
 // Released under the MIT license, see LICENSE.
 
 import * as ts from 'typescript';
+import * as readts from './readts';
 
 /** Property, function / method parameter or variable. */
 
 export class IdentifierSpec {
-	constructor(name: string, type: string, doc: string) {
+	constructor(name: string, type: readts.TypeSpec, doc: string) {
 		this.name = name;
 		this.type = type;
 		if(doc) this.doc = doc;
@@ -15,7 +16,7 @@ export class IdentifierSpec {
 	/** Identifier name. */
 	name: string;
 	/** Type in TypeScript syntax. */
-	type: string;
+	type: readts.TypeSpec;
 	/** Interface members and function / method parameters may be optional. */
 	optional: boolean;
 	/** JSDoc comment. */
diff --git a/src/Parser.ts b/src/Parser.ts
index 1336c96..67ff8f3 100644
--- a/src/Parser.ts
+++ b/src/Parser.ts
@@ -26,6 +26,8 @@ export class Parser {
 
 		this.program = ts.createProgram(config.fileNames, config.options);
 		this.checker = this.program.getTypeChecker();
+		this.moduleList = [];
+		this.symbolTbl = {};
 
 		for(var source of this.program.getSourceFiles()) {
 			// Skip contents of default library.
@@ -37,10 +39,30 @@ export class Parser {
 		return(this.moduleList);
 	}
 
-	private formatType(type: ts.Type) {
+	typeToString(type: ts.Type) {
 		return(this.checker.typeToString(type));
 	}
 
+	private addSymbol(name: string, data: any) {
+		if(!this.symbolTbl[name]) this.symbolTbl[name] = [];
+
+		this.symbolTbl[name].push(data);
+	}
+
+	getSymbol(symbol: ts.Symbol) {
+		for(var match of this.symbolTbl[symbol.getName()] || []) {
+			if(symbol == match.symbol) return(match);
+		}
+
+		return(null);
+	}
+
+	private formatType(type: ts.Type) {
+		var spec = new readts.TypeSpec(type, this);
+
+		return(spec);
+	}
+
 	private parseModule(node: ts.Node) {
 		var spec = new readts.ModuleSpec();
 
@@ -100,7 +122,9 @@ export class Parser {
 	}
 
 	private parseClass(spec: SymbolSpec) {
-		var classSpec = new readts.ClassSpec(spec.name, spec.doc);
+		var classSpec = new readts.ClassSpec(spec.name, spec.symbol, spec.doc);
+
+		this.addSymbol(spec.name, classSpec);
 
 		for(var signature of spec.type.getConstructSignatures()) {
 			classSpec.addConstructor(this.parseSignature(signature));
@@ -167,7 +191,8 @@ export class Parser {
 		);
 	}
 
-	program: ts.Program;
-	checker: ts.TypeChecker;
-	moduleList: readts.ModuleSpec[] = [];
+	private program: ts.Program;
+	private checker: ts.TypeChecker;
+	private moduleList: readts.ModuleSpec[];
+	private symbolTbl: { [name: string]: any[] };
 }
diff --git a/src/SignatureSpec.ts b/src/SignatureSpec.ts
index 24193b2..bc5b5f5 100644
--- a/src/SignatureSpec.ts
+++ b/src/SignatureSpec.ts
@@ -5,7 +5,7 @@ import * as ts from 'typescript';
 import * as readts from './readts';
 
 export class SignatureSpec {
-	constructor(returnType: string, doc: string) {
+	constructor(returnType: readts.TypeSpec, doc: string) {
 		this.returnType = returnType;
 		if(doc) this.doc = doc;
 	}
@@ -17,7 +17,7 @@ export class SignatureSpec {
 	/** List of parameters. */
 	paramList: readts.IdentifierSpec[] = [];
 	/** Return type in TypeScript syntax. */
-	returnType: string;
+	returnType: readts.TypeSpec;
 	/** JSDoc comment. */
 	doc: string;
 }
diff --git a/src/TypeSpec.ts b/src/TypeSpec.ts
new file mode 100644
index 0000000..6de4b8e
--- /dev/null
+++ b/src/TypeSpec.ts
@@ -0,0 +1,68 @@
+// This file is part of readts, copyright (c) 2016 BusFaster Ltd.
+// Released under the MIT license, see LICENSE.
+
+import * as ts from 'typescript';
+import * as readts from './readts';
+
+export interface FormatHooks {
+	[name: string]: (spec: TypeSpec, hooks: FormatHooks) => string;
+
+	class?: (spec: TypeSpec, hooks: FormatHooks) => string;
+	array?: (spec: TypeSpec, hooks: FormatHooks) => string;
+	union?: (spec: TypeSpec, hooks: FormatHooks) => string;
+}
+
+export class TypeSpec {
+	constructor(type: ts.Type, parser: readts.Parser) {
+		var tf = ts.TypeFlags;
+
+		// console.log(Object.keys(tf).map((name: string) => type.flags & tf[name] ? name : null).filter((name) => !!name).join(' | '));
+
+		if(type.flags & ((tf as any).Intrinsic | tf.ThisType | tf.Anonymous | tf.StringLiteral)) {
+			this.name = parser.typeToString(type);
+		} else if(type.flags & tf.Reference) {
+			this.parseReference(type as ts.TypeReference, parser);
+		} else if (type.flags & (tf.Class | tf.Interface | tf.Enum | tf.TypeParameter)) {
+			this.parseClass(type, parser);
+		} else if (type.flags & tf.Tuple) {
+		} else if (type.flags & tf.UnionOrIntersection) {
+			this.parseUnion(type as ts.UnionOrIntersectionType, parser);
+		}
+	}
+
+	parseClass(type: ts.Type, parser: readts.Parser) {
+		var spec = parser.getSymbol(type.symbol);
+
+		if(spec) this.class = spec;
+		else this.name = parser.typeToString(type);
+	}
+
+	parseReference(type: ts.TypeReference, parser: readts.Parser) {
+		if(type.target.symbol.getName() == 'Array' && type.typeArguments) {
+			this.arrayOf = new TypeSpec(type.typeArguments[0], parser);
+		} else this.parseClass(type, parser);
+	}
+
+	parseUnion(type: ts.UnionOrIntersectionType, parser: readts.Parser) {
+		this.unionOf = type.types.map((type: ts.Type) => new TypeSpec(type, parser));
+	}
+
+	format(hooks?: FormatHooks, needParens?: boolean): string {
+		if(this.name) return(this.name);
+		if(this.class) return(hooks && hooks.class ? hooks.class(this, hooks) : this.class.name);
+		if(this.arrayOf) return(hooks && hooks.array ? hooks.array(this, hooks) : this.arrayOf.format(hooks, true) + '[]');
+
+		var output: string;
+
+		if(this.unionOf) output = hooks && hooks.union ? hooks.union(this, hooks) : this.unionOf.map((spec: TypeSpec) => spec.format(hooks, true)).join(' | ');
+
+		if(needParens) output = '(' + output + ')';
+
+		return(output);
+	}
+
+	name: string;
+	class: readts.ClassSpec;
+	unionOf: TypeSpec[];
+	arrayOf: TypeSpec;
+}
diff --git a/src/readts.ts b/src/readts.ts
index c1aaccb..ac253c1 100644
--- a/src/readts.ts
+++ b/src/readts.ts
@@ -6,4 +6,5 @@ export {SignatureSpec} from './SignatureSpec';
 export {FunctionSpec} from './FunctionSpec';
 export {ClassSpec} from './ClassSpec';
 export {ModuleSpec} from './ModuleSpec';
+export {TypeSpec, FormatHooks} from './TypeSpec';
 export {Parser} from './Parser';