diff --git a/src/CSSList/CSSList.php b/src/CSSList/CSSList.php
index 282c7bd6..d1c328c4 100644
--- a/src/CSSList/CSSList.php
+++ b/src/CSSList/CSSList.php
@@ -46,16 +46,16 @@ abstract class CSSList implements Renderable, Commentable
     /**
      * @var int
      */
-    protected $iLineNo;
+    protected $lineNumber;
 
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
         $this->comments = [];
         $this->aContents = [];
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
     }
 
     /**
@@ -255,7 +255,7 @@ private static function identifierIs($sIdentifier, string $sMatch): bool
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 
     /**
diff --git a/src/CSSList/Document.php b/src/CSSList/Document.php
index 8f9426cf..7667587f 100644
--- a/src/CSSList/Document.php
+++ b/src/CSSList/Document.php
@@ -19,11 +19,11 @@
 class Document extends CSSBlockList
 {
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
     }
 
     /**
diff --git a/src/CSSList/KeyFrame.php b/src/CSSList/KeyFrame.php
index 4aefa389..61e70380 100644
--- a/src/CSSList/KeyFrame.php
+++ b/src/CSSList/KeyFrame.php
@@ -20,11 +20,11 @@ class KeyFrame extends CSSList implements AtRule
     private $animationName;
 
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
         $this->vendorKeyFrame = null;
         $this->animationName = null;
     }
diff --git a/src/Parser.php b/src/Parser.php
index 0bb836ac..2b09e507 100644
--- a/src/Parser.php
+++ b/src/Parser.php
@@ -21,14 +21,14 @@ class Parser
     /**
      * @param string $sText the complete CSS as text (i.e., usually the contents of a CSS file)
      * @param Settings|null $oParserSettings
-     * @param int $iLineNo the line number (starting from 1, not from 0)
+     * @param int $lineNumber the line number (starting from 1, not from 0)
      */
-    public function __construct($sText, ?Settings $oParserSettings = null, $iLineNo = 1)
+    public function __construct($sText, ?Settings $oParserSettings = null, $lineNumber = 1)
     {
         if ($oParserSettings === null) {
             $oParserSettings = Settings::create();
         }
-        $this->oParserState = new ParserState($sText, $oParserSettings, $iLineNo);
+        $this->oParserState = new ParserState($sText, $oParserSettings, $lineNumber);
     }
 
     /**
diff --git a/src/Parsing/OutputException.php b/src/Parsing/OutputException.php
index 8b27388a..d52d7380 100644
--- a/src/Parsing/OutputException.php
+++ b/src/Parsing/OutputException.php
@@ -11,10 +11,10 @@ final class OutputException extends SourceException
 {
     /**
      * @param string $sMessage
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sMessage, $iLineNo = 0)
+    public function __construct($sMessage, $lineNumber = 0)
     {
-        parent::__construct($sMessage, $iLineNo);
+        parent::__construct($sMessage, $lineNumber);
     }
 }
diff --git a/src/Parsing/ParserState.php b/src/Parsing/ParserState.php
index 22152fbd..e1e98386 100644
--- a/src/Parsing/ParserState.php
+++ b/src/Parsing/ParserState.php
@@ -54,18 +54,18 @@ class ParserState
     /**
      * @var int
      */
-    private $iLineNo;
+    private $lineNumber;
 
     /**
      * @param string $sText the complete CSS as text (i.e., usually the contents of a CSS file)
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sText, Settings $oParserSettings, $iLineNo = 1)
+    public function __construct($sText, Settings $oParserSettings, $lineNumber = 1)
     {
         $this->oParserSettings = $oParserSettings;
         $this->sText = $sText;
         $this->iCurrentPosition = 0;
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
         $this->setCharset($this->oParserSettings->sDefaultCharset);
     }
 
@@ -98,7 +98,7 @@ public function getCharset()
      */
     public function currentLine()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 
     /**
@@ -140,11 +140,11 @@ public function setPosition($iPosition): void
     public function parseIdentifier($bIgnoreCase = true)
     {
         if ($this->isEnd()) {
-            throw new UnexpectedEOFException('', '', 'identifier', $this->iLineNo);
+            throw new UnexpectedEOFException('', '', 'identifier', $this->lineNumber);
         }
         $sResult = $this->parseCharacter(true);
         if ($sResult === null) {
-            throw new UnexpectedTokenException($sResult, $this->peek(5), 'identifier', $this->iLineNo);
+            throw new UnexpectedTokenException($sResult, $this->peek(5), 'identifier', $this->lineNumber);
         }
         $sCharacter = null;
         while (!$this->isEnd() && ($sCharacter = $this->parseCharacter(true)) !== null) {
@@ -290,18 +290,18 @@ public function consume($mValue = 1): string
             $iLineCount = \substr_count($mValue, "\n");
             $iLength = $this->strlen($mValue);
             if (!$this->streql($this->substr($this->iCurrentPosition, $iLength), $mValue)) {
-                throw new UnexpectedTokenException($mValue, $this->peek(\max($iLength, 5)), $this->iLineNo);
+                throw new UnexpectedTokenException($mValue, $this->peek(\max($iLength, 5)), $this->lineNumber);
             }
-            $this->iLineNo += $iLineCount;
+            $this->lineNumber += $iLineCount;
             $this->iCurrentPosition += $this->strlen($mValue);
             return $mValue;
         } else {
             if ($this->iCurrentPosition + $mValue > $this->iLength) {
-                throw new UnexpectedEOFException($mValue, $this->peek(5), 'count', $this->iLineNo);
+                throw new UnexpectedEOFException($mValue, $this->peek(5), 'count', $this->lineNumber);
             }
             $sResult = $this->substr($this->iCurrentPosition, $mValue);
             $iLineCount = \substr_count($sResult, "\n");
-            $this->iLineNo += $iLineCount;
+            $this->lineNumber += $iLineCount;
             $this->iCurrentPosition += $mValue;
             return $sResult;
         }
@@ -321,7 +321,7 @@ public function consumeExpression($mExpression, $iMaxLength = null): string
         if (\preg_match($mExpression, $sInput, $aMatches, PREG_OFFSET_CAPTURE) === 1) {
             return $this->consume($aMatches[0][0]);
         }
-        throw new UnexpectedTokenException($mExpression, $this->peek(5), 'expression', $this->iLineNo);
+        throw new UnexpectedTokenException($mExpression, $this->peek(5), 'expression', $this->lineNumber);
     }
 
     /**
@@ -331,7 +331,7 @@ public function consumeComment()
     {
         $mComment = false;
         if ($this->comes('/*')) {
-            $iLineNo = $this->iLineNo;
+            $lineNumber = $this->lineNumber;
             $this->consume(1);
             $mComment = '';
             while (($char = $this->consume(1)) !== '') {
@@ -345,7 +345,7 @@ public function consumeComment()
 
         if ($mComment !== false) {
             // We skip the * which was included in the comment.
-            return new Comment(\substr($mComment, 1), $iLineNo);
+            return new Comment(\substr($mComment, 1), $lineNumber);
         }
 
         return $mComment;
@@ -396,7 +396,7 @@ public function consumeUntil($aEnd, $bIncludeEnd = false, $consumeEnd = false, a
             'One of ("' . \implode('","', $aEnd) . '")',
             $this->peek(5),
             'search',
-            $this->iLineNo
+            $this->lineNumber
         );
     }
 
diff --git a/src/Parsing/SourceException.php b/src/Parsing/SourceException.php
index 67092550..77adb478 100644
--- a/src/Parsing/SourceException.php
+++ b/src/Parsing/SourceException.php
@@ -9,17 +9,17 @@ class SourceException extends \Exception
     /**
      * @var int
      */
-    private $iLineNo;
+    private $lineNumber;
 
     /**
      * @param string $sMessage
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sMessage, $iLineNo = 0)
+    public function __construct($sMessage, $lineNumber = 0)
     {
-        $this->iLineNo = $iLineNo;
-        if ($iLineNo !== 0) {
-            $sMessage .= " [line no: $iLineNo]";
+        $this->lineNumber = $lineNumber;
+        if ($lineNumber !== 0) {
+            $sMessage .= " [line no: $lineNumber]";
         }
         parent::__construct($sMessage);
     }
@@ -29,6 +29,6 @@ public function __construct($sMessage, $iLineNo = 0)
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 }
diff --git a/src/Parsing/UnexpectedTokenException.php b/src/Parsing/UnexpectedTokenException.php
index 55effb64..3620ff01 100644
--- a/src/Parsing/UnexpectedTokenException.php
+++ b/src/Parsing/UnexpectedTokenException.php
@@ -30,9 +30,9 @@ class UnexpectedTokenException extends SourceException
      * @param string $sExpected
      * @param string $sFound
      * @param string $sMatchType
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sExpected, $sFound, $sMatchType = 'literal', $iLineNo = 0)
+    public function __construct($sExpected, $sFound, $sMatchType = 'literal', $lineNumber = 0)
     {
         $this->sExpected = $sExpected;
         $this->sFound = $sFound;
@@ -48,6 +48,6 @@ public function __construct($sExpected, $sFound, $sMatchType = 'literal', $iLine
             $sMessage = \trim("$sExpected $sFound");
         }
 
-        parent::__construct($sMessage, $iLineNo);
+        parent::__construct($sMessage, $lineNumber);
     }
 }
diff --git a/src/Property/CSSNamespace.php b/src/Property/CSSNamespace.php
index 1a827434..fcce5d08 100644
--- a/src/Property/CSSNamespace.php
+++ b/src/Property/CSSNamespace.php
@@ -25,7 +25,7 @@ class CSSNamespace implements AtRule
     /**
      * @var int
      */
-    private $iLineNo;
+    private $lineNumber;
 
     /**
      * @var array<array-key, Comment>
@@ -35,13 +35,13 @@ class CSSNamespace implements AtRule
     /**
      * @param string $mUrl
      * @param string|null $sPrefix
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($mUrl, $sPrefix = null, $iLineNo = 0)
+    public function __construct($mUrl, $sPrefix = null, $lineNumber = 0)
     {
         $this->mUrl = $mUrl;
         $this->sPrefix = $sPrefix;
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
         $this->comments = [];
     }
 
@@ -50,7 +50,7 @@ public function __construct($mUrl, $sPrefix = null, $iLineNo = 0)
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 
     public function __toString(): string
diff --git a/src/Property/Charset.php b/src/Property/Charset.php
index a36e55a2..ac704b48 100644
--- a/src/Property/Charset.php
+++ b/src/Property/Charset.php
@@ -26,7 +26,7 @@ class Charset implements AtRule
     /**
      * @var int
      */
-    protected $iLineNo;
+    protected $lineNumber;
 
     /**
      * @var array<array-key, Comment>
@@ -35,12 +35,12 @@ class Charset implements AtRule
 
     /**
      * @param CSSString $oCharset
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct(CSSString $oCharset, $iLineNo = 0)
+    public function __construct(CSSString $oCharset, $lineNumber = 0)
     {
         $this->oCharset = $oCharset;
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
         $this->comments = [];
     }
 
@@ -49,7 +49,7 @@ public function __construct(CSSString $oCharset, $iLineNo = 0)
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 
     /**
diff --git a/src/Property/Import.php b/src/Property/Import.php
index ec8c97df..12106766 100644
--- a/src/Property/Import.php
+++ b/src/Property/Import.php
@@ -26,7 +26,7 @@ class Import implements AtRule
     /**
      * @var int
      */
-    protected $iLineNo;
+    protected $lineNumber;
 
     /**
      * @var array<array-key, Comment>
@@ -36,13 +36,13 @@ class Import implements AtRule
     /**
      * @param URL $oLocation
      * @param string $sMediaQuery
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct(URL $oLocation, $sMediaQuery, $iLineNo = 0)
+    public function __construct(URL $oLocation, $sMediaQuery, $lineNumber = 0)
     {
         $this->oLocation = $oLocation;
         $this->sMediaQuery = $sMediaQuery;
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
         $this->comments = [];
     }
 
@@ -51,7 +51,7 @@ public function __construct(URL $oLocation, $sMediaQuery, $iLineNo = 0)
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 
     /**
diff --git a/src/Rule/Rule.php b/src/Rule/Rule.php
index d598a366..3f01a3fd 100644
--- a/src/Rule/Rule.php
+++ b/src/Rule/Rule.php
@@ -44,7 +44,7 @@ class Rule implements Renderable, Commentable
     /**
      * @var int
      */
-    protected $iLineNo;
+    protected $lineNumber;
 
     /**
      * @var int
@@ -58,16 +58,16 @@ class Rule implements Renderable, Commentable
 
     /**
      * @param string $sRule
-     * @param int $iLineNo
+     * @param int $lineNumber
      * @param int $iColNo
      */
-    public function __construct($sRule, $iLineNo = 0, $iColNo = 0)
+    public function __construct($sRule, $lineNumber = 0, $iColNo = 0)
     {
         $this->sRule = $sRule;
         $this->mValue = null;
         $this->bIsImportant = false;
         $this->aIeHack = [];
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
         $this->iColNo = $iColNo;
         $this->comments = [];
     }
@@ -141,7 +141,7 @@ private static function listDelimiterForRule($sRule): array
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 
     /**
@@ -159,7 +159,7 @@ public function getColNo()
     public function setPosition($iLine, $iColumn): void
     {
         $this->iColNo = $iColumn;
-        $this->iLineNo = $iLine;
+        $this->lineNumber = $iLine;
     }
 
     /**
@@ -208,7 +208,7 @@ public function addValue($mValue, $sType = ' '): void
         }
         if (!$this->mValue instanceof RuleValueList || $this->mValue->getListSeparator() !== $sType) {
             $mCurrentValue = $this->mValue;
-            $this->mValue = new RuleValueList($sType, $this->iLineNo);
+            $this->mValue = new RuleValueList($sType, $this->lineNumber);
             if ($mCurrentValue) {
                 $this->mValue->addListComponent($mCurrentValue);
             }
diff --git a/src/RuleSet/AtRuleSet.php b/src/RuleSet/AtRuleSet.php
index b52ad127..4a9329a8 100644
--- a/src/RuleSet/AtRuleSet.php
+++ b/src/RuleSet/AtRuleSet.php
@@ -28,11 +28,11 @@ class AtRuleSet extends RuleSet implements AtRule
     /**
      * @param string $sType
      * @param string $sArgs
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sType, $sArgs = '', $iLineNo = 0)
+    public function __construct($sType, $sArgs = '', $lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
         $this->sType = $sType;
         $this->sArgs = $sArgs;
     }
diff --git a/src/RuleSet/DeclarationBlock.php b/src/RuleSet/DeclarationBlock.php
index 4a26e6d5..f4ce86bd 100644
--- a/src/RuleSet/DeclarationBlock.php
+++ b/src/RuleSet/DeclarationBlock.php
@@ -36,11 +36,11 @@ class DeclarationBlock extends RuleSet
     private $aSelectors;
 
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
         $this->aSelectors = [];
     }
 
@@ -396,8 +396,8 @@ public function expandBackgroundShorthand(): void
             'background-repeat' => ['repeat'],
             'background-attachment' => ['scroll'],
             'background-position' => [
-                new Size(0, '%', false, $this->iLineNo),
-                new Size(0, '%', false, $this->iLineNo),
+                new Size(0, '%', false, $this->lineNumber),
+                new Size(0, '%', false, $this->lineNumber),
             ],
         ];
         $mRuleValue = $oRule->getValue();
@@ -749,7 +749,7 @@ public function createFontShorthand(): void
                 $aLHValues = $mRuleValue->getListComponents();
             }
             if ($aLHValues[0] !== 'normal') {
-                $val = new RuleValueList('/', $this->iLineNo);
+                $val = new RuleValueList('/', $this->lineNumber);
                 $val->addListComponent($aFSValues[0]);
                 $val->addListComponent($aLHValues[0]);
                 $oNewRule->addValue($val);
@@ -765,7 +765,7 @@ public function createFontShorthand(): void
         } else {
             $aFFValues = $mRuleValue->getListComponents();
         }
-        $oFFValue = new RuleValueList(',', $this->iLineNo);
+        $oFFValue = new RuleValueList(',', $this->lineNumber);
         $oFFValue->setListComponents($aFFValues);
         $oNewRule->addValue($oFFValue);
 
@@ -791,7 +791,7 @@ public function render(OutputFormat $oOutputFormat): string
         $sResult = $oOutputFormat->comments($this);
         if (\count($this->aSelectors) === 0) {
             // If all the selectors have been removed, this declaration block becomes invalid
-            throw new OutputException('Attempt to print declaration block with missing selector', $this->iLineNo);
+            throw new OutputException('Attempt to print declaration block with missing selector', $this->lineNumber);
         }
         $sResult .= $oOutputFormat->sBeforeDeclarationBlock;
         $sResult .= $oOutputFormat->implode(
diff --git a/src/RuleSet/RuleSet.php b/src/RuleSet/RuleSet.php
index 2920830c..b05b9c8a 100644
--- a/src/RuleSet/RuleSet.php
+++ b/src/RuleSet/RuleSet.php
@@ -32,7 +32,7 @@ abstract class RuleSet implements Renderable, Commentable
     /**
      * @var int
      */
-    protected $iLineNo;
+    protected $lineNumber;
 
     /**
      * @var array<array-key, Comment>
@@ -40,12 +40,12 @@ abstract class RuleSet implements Renderable, Commentable
     protected $comments;
 
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
         $this->aRules = [];
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
         $this->comments = [];
     }
 
@@ -94,7 +94,7 @@ public static function parseRuleSet(ParserState $oParserState, RuleSet $oRuleSet
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 
     /**
diff --git a/src/Value/CSSFunction.php b/src/Value/CSSFunction.php
index 6f493d63..0cb3488b 100644
--- a/src/Value/CSSFunction.php
+++ b/src/Value/CSSFunction.php
@@ -22,17 +22,17 @@ class CSSFunction extends ValueList
      * @param string $sName
      * @param RuleValueList|array<array-key, Value|string> $aArguments
      * @param string $sSeparator
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sName, $aArguments, $sSeparator = ',', $iLineNo = 0)
+    public function __construct($sName, $aArguments, $sSeparator = ',', $lineNumber = 0)
     {
         if ($aArguments instanceof RuleValueList) {
             $sSeparator = $aArguments->getListSeparator();
             $aArguments = $aArguments->getListComponents();
         }
         $this->sName = $sName;
-        $this->iLineNo = $iLineNo;
-        parent::__construct($aArguments, $sSeparator, $iLineNo);
+        $this->lineNumber = $lineNumber;
+        parent::__construct($aArguments, $sSeparator, $lineNumber);
     }
 
     /**
diff --git a/src/Value/CSSString.php b/src/Value/CSSString.php
index f212bdd8..64bd4091 100644
--- a/src/Value/CSSString.php
+++ b/src/Value/CSSString.php
@@ -24,12 +24,12 @@ class CSSString extends PrimitiveValue
 
     /**
      * @param string $sString
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sString, $iLineNo = 0)
+    public function __construct($sString, $lineNumber = 0)
     {
         $this->sString = $sString;
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
     }
 
     /**
diff --git a/src/Value/CalcRuleValueList.php b/src/Value/CalcRuleValueList.php
index 042e697b..508296d9 100644
--- a/src/Value/CalcRuleValueList.php
+++ b/src/Value/CalcRuleValueList.php
@@ -9,11 +9,11 @@
 class CalcRuleValueList extends RuleValueList
 {
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
-        parent::__construct(',', $iLineNo);
+        parent::__construct(',', $lineNumber);
     }
 
     /**
diff --git a/src/Value/LineName.php b/src/Value/LineName.php
index 2d334c0b..9011acad 100644
--- a/src/Value/LineName.php
+++ b/src/Value/LineName.php
@@ -13,11 +13,11 @@ class LineName extends ValueList
 {
     /**
      * @param array<int, Value|string> $aComponents
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct(array $aComponents = [], $iLineNo = 0)
+    public function __construct(array $aComponents = [], $lineNumber = 0)
     {
-        parent::__construct($aComponents, ' ', $iLineNo);
+        parent::__construct($aComponents, ' ', $lineNumber);
     }
 
     /**
diff --git a/src/Value/PrimitiveValue.php b/src/Value/PrimitiveValue.php
index f9afd851..4cccf35c 100644
--- a/src/Value/PrimitiveValue.php
+++ b/src/Value/PrimitiveValue.php
@@ -7,10 +7,10 @@
 abstract class PrimitiveValue extends Value
 {
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
     }
 }
diff --git a/src/Value/RuleValueList.php b/src/Value/RuleValueList.php
index 93d8e617..b68df0ea 100644
--- a/src/Value/RuleValueList.php
+++ b/src/Value/RuleValueList.php
@@ -13,10 +13,10 @@ class RuleValueList extends ValueList
 {
     /**
      * @param string $sSeparator
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($sSeparator = ',', $iLineNo = 0)
+    public function __construct($sSeparator = ',', $lineNumber = 0)
     {
-        parent::__construct([], $sSeparator, $iLineNo);
+        parent::__construct([], $sSeparator, $lineNumber);
     }
 }
diff --git a/src/Value/Size.php b/src/Value/Size.php
index 0ba4bd66..bf7ce6b8 100644
--- a/src/Value/Size.php
+++ b/src/Value/Size.php
@@ -71,11 +71,11 @@ class Size extends PrimitiveValue
      * @param float|int|string $fSize
      * @param string|null $sUnit
      * @param bool $bIsColorComponent
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($fSize, $sUnit = null, $bIsColorComponent = false, $iLineNo = 0)
+    public function __construct($fSize, $sUnit = null, $bIsColorComponent = false, $lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
         $this->fSize = (float) $fSize;
         $this->sUnit = $sUnit;
         $this->bIsColorComponent = $bIsColorComponent;
diff --git a/src/Value/URL.php b/src/Value/URL.php
index 0561719f..ef180eab 100644
--- a/src/Value/URL.php
+++ b/src/Value/URL.php
@@ -21,11 +21,11 @@ class URL extends PrimitiveValue
     private $oURL;
 
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct(CSSString $oURL, $iLineNo = 0)
+    public function __construct(CSSString $oURL, $lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
         $this->oURL = $oURL;
     }
 
diff --git a/src/Value/Value.php b/src/Value/Value.php
index 3a7f21db..9c8ad164 100644
--- a/src/Value/Value.php
+++ b/src/Value/Value.php
@@ -19,14 +19,14 @@ abstract class Value implements Renderable
     /**
      * @var int
      */
-    protected $iLineNo;
+    protected $lineNumber;
 
     /**
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($iLineNo = 0)
+    public function __construct($lineNumber = 0)
     {
-        $this->iLineNo = $iLineNo;
+        $this->lineNumber = $lineNumber;
     }
 
     /**
@@ -214,6 +214,6 @@ private static function parseUnicodeRangeValue(ParserState $oParserState): strin
      */
     public function getLineNo()
     {
-        return $this->iLineNo;
+        return $this->lineNumber;
     }
 }
diff --git a/src/Value/ValueList.php b/src/Value/ValueList.php
index 4a245ed1..445bba26 100644
--- a/src/Value/ValueList.php
+++ b/src/Value/ValueList.php
@@ -27,11 +27,11 @@ abstract class ValueList extends Value
     /**
      * @param array<array-key, Value|string>|Value|string $aComponents
      * @param string $sSeparator
-     * @param int $iLineNo
+     * @param int $lineNumber
      */
-    public function __construct($aComponents = [], $sSeparator = ',', $iLineNo = 0)
+    public function __construct($aComponents = [], $sSeparator = ',', $lineNumber = 0)
     {
-        parent::__construct($iLineNo);
+        parent::__construct($lineNumber);
         if (!\is_array($aComponents)) {
             $aComponents = [$aComponents];
         }