diff --git a/.gitignore b/.gitignore
index ef9df96..6b3069e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,10 @@ __pycache__/
 # C extensions
 *.so
 
+# Local data and mappings
+data/
+mappings/
+
 # Distribution / packaging
 .Python
 build/
diff --git a/thebeast/contrib/jinja_custom_filters/__init__.py b/thebeast/contrib/jinja_custom_filters/__init__.py
new file mode 100644
index 0000000..e85e2f3
--- /dev/null
+++ b/thebeast/contrib/jinja_custom_filters/__init__.py
@@ -0,0 +1,16 @@
+import re
+
+def regex_search(string, pattern):
+    # Search for a pattern in the given string.
+    
+    match = re.search(pattern, string)
+    return match.group(0) if match else None
+
+def regex_match(string, pattern):
+    #Check if the entire string matches the pattern.
+    return bool(re.fullmatch(pattern, string))
+
+def regex_replace(string, pattern, replacement):
+    #Replace occurrences of the pattern with the replacement in the string.
+
+    return re.sub(pattern, replacement, string)
diff --git a/thebeast/digest/resolvers.py b/thebeast/digest/resolvers.py
index f37a74e..9c1fc31 100644
--- a/thebeast/digest/resolvers.py
+++ b/thebeast/digest/resolvers.py
@@ -4,6 +4,8 @@
 
 
 from jinja2 import Environment, BaseLoader, select_autoescape
+from thebeast.contrib.jinja_custom_filters import regex_search, regex_match, regex_replace
+
 from followthemoney.schema import Schema  # type: ignore
 from thebeast.contrib.ftm_ext.rigged_entity_proxy import StrProxy
 
@@ -11,6 +13,9 @@
 
 # TODO: expose jmespath to templates as a filter?
 jinja_env = Environment(loader=BaseLoader(), autoescape=select_autoescape())
+jinja_env.filters['regex_search'] = regex_search
+jinja_env.filters['regex_match'] = regex_match
+jinja_env.filters['regex_replace'] = regex_replace
 
 
 @dataclass