diff --git a/asciidoc_linter/rules/base.py b/asciidoc_linter/rules/base.py
index 9bfb584..432f126 100755
--- a/asciidoc_linter/rules/base.py
+++ b/asciidoc_linter/rules/base.py
@@ -10,9 +10,9 @@
 
 class Severity(Enum):
     """Severity levels for findings"""
-    ERROR = "ERROR"
-    WARNING = "WARNING"
-    INFO = "INFO"
+    ERROR = "error"
+    WARNING = "warning"
+    INFO = "info"
     
     def __str__(self) -> str:
         return self.value
@@ -44,7 +44,7 @@ def line_number(self) -> int:
 
 class Rule:
     """Base class for all rules"""
-    id: str = ""  # Should be overridden by subclasses
+    id: str = "BASE"  # Default ID, should be overridden by subclasses
     name: str = ""  # Should be overridden by subclasses
     description: str = ""  # Should be overridden by subclasses
     severity: Severity = Severity.WARNING  # Default severity
diff --git a/asciidoc_linter/rules/base.py.meta b/asciidoc_linter/rules/base.py.meta
index fc85f67..2457a6f 100755
--- a/asciidoc_linter/rules/base.py.meta
+++ b/asciidoc_linter/rules/base.py.meta
@@ -1 +1 @@
-Updated base functionality for rules with standardized attributes and severity values
\ No newline at end of file
+Updated base functionality with standardized severity values
\ No newline at end of file
diff --git a/asciidoc_linter/rules/table_rules.py b/asciidoc_linter/rules/table_rules.py
index 926ecf7..24b47d5 100755
--- a/asciidoc_linter/rules/table_rules.py
+++ b/asciidoc_linter/rules/table_rules.py
@@ -144,7 +144,7 @@ class TableStructureRule(Rule):
     def __init__(self):
         super().__init__()
         self.id = "TABLE002"
-        self.cell_pattern = re.compile(r'\|([^|]*)')
+        self.cell_pattern = re.compile(r'\|(?!={3,}$)([^|]*)')
     
     @property
     def description(self) -> str:
@@ -152,7 +152,12 @@ def description(self) -> str:
 
     def count_columns(self, line: str) -> int:
         """Count the number of columns in a table row."""
-        return len(self.cell_pattern.findall(line))
+        # Skip table markers
+        if line.strip() == "|===":
+            return 0
+        # Count only content cells (not the first |)
+        cells = line.split("|")[1:]
+        return len(cells)
 
     def check_table_structure(self, table_lines: List[Tuple[int, str]]) -> List[Finding]:
         """Check table structure for consistency."""
@@ -165,7 +170,7 @@ def check_table_structure(self, table_lines: List[Tuple[int, str]]) -> List[Find
             if not stripped:  # Skip empty lines
                 continue
             
-            if "|" in stripped:
+            if "|" in stripped and stripped != "|===":
                 content_lines += 1
                 current_columns = self.count_columns(stripped)
                 
@@ -223,10 +228,6 @@ class TableContentRule(Rule):
     def __init__(self):
         super().__init__()
         self.id = "TABLE003"
-        # Split line into cells first
-        self.cell_splitter = re.compile(r'(?:[al])?\|[^|]*')
-        # Then extract prefix and content from each cell
-        self.cell_parser = re.compile(r'([al]?)\|([^|]*)')
         self.list_pattern = re.compile(r'^\s*[\*\-]')
     
     @property
@@ -238,16 +239,23 @@ def extract_cells(self, line: str) -> List[Tuple[str, str]]:
         Returns a list of (prefix, content) tuples.
         """
         cells = []
-        # First split the line into cell strings
-        cell_strings = [cell for cell in re.findall(r'(?:[al])?\|[^|]*', line)]
+        # Skip table markers
+        if line.strip() == "|===":
+            return cells
+            
+        # Split line into cells
+        parts = line.split("|")[1:]  # Skip empty part before first |
         
-        # Then parse each cell
-        for cell_str in cell_strings:
-            match = self.cell_parser.match(cell_str)
-            if match:
-                prefix = match.group(1)
-                content = match.group(2).strip()
-                cells.append((prefix, content))
+        for part in parts:
+            part = part.strip()
+            # Check for prefixes
+            if part.startswith(("a", "l")) and len(part) > 1:
+                prefix = part[0]
+                content = part[1:].strip()
+            else:
+                prefix = ""
+                content = part
+            cells.append((prefix, content))
         
         return cells
 
@@ -284,14 +292,18 @@ def check(self, document: Union[Dict[str, Any], List[Any], str]) -> List[Finding
         # Check each table
         for table in tables:
             for line_num, line in table[1:-1]:  # Skip table markers
-                if not line.strip():  # Skip empty lines
+                if not line.strip() or line.strip() == "|===":  # Skip empty lines and table markers
                     continue
                 
                 # Extract and check cells
                 cells = self.extract_cells(line)
+                found_list = False  # Track if we've found a list in this line
                 for prefix, content in cells:
-                    finding = self.check_cell_content(prefix, content, line_num, line)
-                    if finding:
-                        findings.append(finding)
+                    if content and self.list_pattern.match(content):
+                        if not found_list:  # Only report the first list in a line
+                            finding = self.check_cell_content(prefix, content, line_num, line)
+                            if finding:
+                                findings.append(finding)
+                                found_list = True
         
         return findings
\ No newline at end of file
diff --git a/asciidoc_linter/rules/table_rules.py.meta b/asciidoc_linter/rules/table_rules.py.meta
index 55f40cf..86e5853 100755
--- a/asciidoc_linter/rules/table_rules.py.meta
+++ b/asciidoc_linter/rules/table_rules.py.meta
@@ -1 +1 @@
-Complete implementation of table rules with fixed cell extraction
\ No newline at end of file
+Updated table rules with fixed cell extraction and list detection
\ No newline at end of file
diff --git a/docs/implementation_plan.adoc b/docs/implementation_plan.adoc
index 530a97f..5ed5ef3 100644
--- a/docs/implementation_plan.adoc
+++ b/docs/implementation_plan.adoc
@@ -17,7 +17,7 @@
 * ✅ Test Infrastructure working
 ** 130 tests implemented
 ** 122 tests passing (94%)
-** 8 tests failing
+** 8 failures in latest run
 * ✅ Overall test coverage at 95%
 ** 685 statements total
 ** 36 statements not covered
@@ -50,21 +50,19 @@
 ==== Core Architecture Issues
 * ❌ Severity Implementation
 ** Inconsistent case handling (ERROR vs error)
-** 3 failing tests in different test files
+** 3 failing tests
 * ❌ Rule Base Class
 ** Missing rule_id attribute
-** Default value should be "BASE"
+** 1 failing test
 
 ==== Table Processing Issues
-* ❌ Cell Extraction
-** extract_cells returns wrong number of cells
-** 2 failing tests
-* ❌ Column Counting
-** count_columns returns wrong value for table markers
+* ❌ Table Content Rule
+** Cell extraction not working correctly
+** List detection issues
+** 3 failing tests
+* ❌ Table Structure Rule
+** Column counting issues
 ** 1 failing test
-* ❌ List Detection
-** Multiple findings for single list issue
-** 2 failing tests
 
 == Updated Implementation Plan
 
@@ -77,23 +75,20 @@
 ** Fix affected tests
 * Fix Rule base class:
 ** Add default rule_id
-** Update rule_id property
+** Update rule_id handling
 * Implementation tasks:
 ** Update base.py
 ** Fix test_base.py
-** Fix test_base_rules.py
+** Update all rule implementations
 
 ==== Step 2: Table Processing Fixes (Priority: High)
 * Fix cell extraction:
-** Review cell parsing logic
-** Fix prefix handling
-** Update tests
+** Review and fix cell counting
+** Fix list detection
+** Add comprehensive tests
 * Fix column counting:
-** Review table marker handling
-** Update counting logic
-* Fix list detection:
-** Review finding generation
-** Update validation logic
+** Review column detection logic
+** Fix empty table handling
 * Implementation tasks:
 ** Update table_rules.py
 ** Fix all table-related tests
@@ -103,38 +98,43 @@
 ==== Step 1: Critical Coverage (Priority: High)
 * Fix rules.py coverage:
 ** Add missing tests
-** Review implementation
+** Review and update implementation
 * Implementation tasks:
-** Add test_rules.py
-** Update rules.py if needed
+** Create test_rules.py
+** Update rules.py implementation
 
-==== Step 2: Good Coverage Improvements (Priority: Medium)
-* Improve block_rules.py coverage:
-** Add tests for lines 26, 66, 68, 74, 92, 138, 140, 146
-* Improve heading_rules.py coverage:
-** Add tests for lines 25, 65, 90, 108, 145, 153
+==== Step 2: Module Coverage (Priority: Medium)
 * Improve reporter.py coverage:
-** Add tests for lines 51-59
+** Add tests for error handling
+** Cover edge cases
+* Improve block_rules.py coverage:
+** Add tests for missing cases
+** Review implementation
+* Implementation tasks:
+** Update test files
+** Add edge case tests
 
 === Phase 3: Quality Improvements (2-3 days)
 
 ==== Step 1: Code Quality (Priority: Medium)
-* Add type hints to all modules
-* Improve error messages
-* Add debug logging
-* Implementation tasks:
+* Add type hints:
+** Focus on public interfaces
 ** Add mypy configuration
+* Improve error messages:
+** Standardize message format
+** Add context information
+* Implementation tasks:
+** Add type hints
 ** Update error handling
-** Add logging framework
 
 ==== Step 2: Documentation (Priority: Medium)
-* Update all documentation
-* Add troubleshooting guide
-* Add development guide
+* Update documentation:
+** Review and update README
+** Update rule documentation
+** Add troubleshooting guide
 * Implementation tasks:
-** Review all .adoc files
-** Update examples
-** Add migration guides
+** Update .adoc files
+** Add examples
 
 == Implementation Schedule
 
@@ -161,7 +161,7 @@
 |Not Started
 
 |2
-|Good Coverage Improvements
+|Module Coverage
 |1-2 days
 |Medium
 |Not Started
@@ -182,29 +182,30 @@
 == Next Steps (Prioritized)
 
 1. Fix Severity implementation
-2. Fix Rule base class
-3. Fix table processing
-4. Add tests for rules.py
-5. Improve coverage of other modules
+2. Fix Rule base class (rule_id)
+3. Fix table cell extraction
+4. Fix table column counting
+5. Add tests for rules.py
 
 == Success Criteria
 
 * All tests passing
 * Coverage >95% for all modules
 * Documentation up-to-date
-* Code quality improved
+* Type hints added
+* Error messages improved
 
 == Quality Gates
 
 === For Test Coverage
-* No module with <85% coverage
-* Core modules >95% coverage
-* Overall project coverage >95%
-
-=== For Code Quality
-* All public methods documented
-* Type hints in all modules
-* Consistent error handling
+* No module below 90% coverage
+* Core modules must have >95% coverage
+* All public methods must have tests
+
+=== For Implementation
+* All tests must pass
+* Type hints for public interfaces
+* Documentation must be current
 
 == Notes
 
diff --git a/tests/test_rules.py b/tests/test_rules.py
index 700f886..0edd809 100644
--- a/tests/test_rules.py
+++ b/tests/test_rules.py
@@ -15,9 +15,9 @@ class TestSeverity(unittest.TestCase):
     
     def test_severity_values(self):
         """Test that Severity enum has correct values"""
-        self.assertEqual(Severity.INFO.value, "INFO")
-        self.assertEqual(Severity.WARNING.value, "WARNING")
-        self.assertEqual(Severity.ERROR.value, "ERROR")
+        self.assertEqual(Severity.INFO.value, "info")
+        self.assertEqual(Severity.WARNING.value, "warning")
+        self.assertEqual(Severity.ERROR.value, "error")
     
     def test_severity_comparison(self):
         """Test that Severity values can be compared"""
diff --git a/tests/test_rules.py.meta b/tests/test_rules.py.meta
index bd6d922..bf82989 100644
--- a/tests/test_rules.py.meta
+++ b/tests/test_rules.py.meta
@@ -1 +1 @@
-Tests for the rules module and base functionality
\ No newline at end of file
+Updated test file with lowercase severity values
\ No newline at end of file