diff --git a/src/Value/Value.php b/src/Value/Value.php
index 8de17d7d..63577db9 100644
--- a/src/Value/Value.php
+++ b/src/Value/Value.php
@@ -3,20 +3,37 @@
 namespace Sabberworm\CSS\Value;
 
 use Sabberworm\CSS\Parsing\ParserState;
+use Sabberworm\CSS\Parsing\SourceException;
+use Sabberworm\CSS\Parsing\UnexpectedEOFException;
 use Sabberworm\CSS\Parsing\UnexpectedTokenException;
 use Sabberworm\CSS\Renderable;
 
 abstract class Value implements Renderable
 {
+    /**
+     * @var int
+     */
     protected $iLineNo;
 
+    /**
+     * @param int $iLineNo
+     */
     public function __construct($iLineNo = 0)
     {
         $this->iLineNo = $iLineNo;
     }
 
+    /**
+     * @param array<array-key, string> $aListDelimiters
+     *
+     * @return RuleValueList|CSSFunction|CSSString|LineName|Size|URL|string
+     *
+     * @throws UnexpectedTokenException
+     * @throws UnexpectedEOFException
+     */
     public static function parseValue(ParserState $oParserState, array $aListDelimiters = [])
     {
+        /** @var array<int, RuleValueList|CSSFunction|CSSString|LineName|Size|URL|string> $aStack */
         $aStack = [];
         $oParserState->consumeWhiteSpace();
         //Build a list of delimiters and parsed values
@@ -43,7 +60,7 @@ public static function parseValue(ParserState $oParserState, array $aListDelimit
             array_push($aStack, self::parsePrimitiveValue($oParserState));
             $oParserState->consumeWhiteSpace();
         }
-        //Convert the list to list objects
+        // Convert the list to list objects
         foreach ($aListDelimiters as $sDelimiter) {
             if (count($aStack) === 1) {
                 return $aStack[0];
@@ -74,6 +91,14 @@ public static function parseValue(ParserState $oParserState, array $aListDelimit
         return $aStack[0];
     }
 
+    /**
+     * @param bool $bIgnoreCase
+     *
+     * @return CSSFunction|string
+     *
+     * @throws UnexpectedEOFException
+     * @throws UnexpectedTokenException
+     */
     public static function parseIdentifierOrFunction(ParserState $oParserState, $bIgnoreCase = false)
     {
         $sResult = $oParserState->parseIdentifier($bIgnoreCase);
@@ -88,6 +113,13 @@ public static function parseIdentifierOrFunction(ParserState $oParserState, $bIg
         return $sResult;
     }
 
+    /**
+     * @return CSSFunction|CSSString|LineName|Size|URL|string
+     *
+     * @throws UnexpectedEOFException
+     * @throws UnexpectedTokenException
+     * @throws SourceException
+     */
     public static function parsePrimitiveValue(ParserState $oParserState)
     {
         $oValue = null;
@@ -123,6 +155,12 @@ public static function parsePrimitiveValue(ParserState $oParserState)
         return $oValue;
     }
 
+    /**
+     * @return CSSFunction
+     *
+     * @throws UnexpectedEOFException
+     * @throws UnexpectedTokenException
+     */
     private static function parseMicrosoftFilter(ParserState $oParserState)
     {
         $sFunction = $oParserState->consumeUntil('(', false, true);
@@ -130,6 +168,12 @@ private static function parseMicrosoftFilter(ParserState $oParserState)
         return new CSSFunction($sFunction, $aArguments, ',', $oParserState->currentLine());
     }
 
+    /**
+     * @return string
+     *
+     * @throws UnexpectedEOFException
+     * @throws UnexpectedTokenException
+     */
     private static function parseUnicodeRangeValue(ParserState $oParserState)
     {
         $iCodepointMaxLenth = 6; // Code points outside BMP can use up to six digits