diff --git a/PyTeX/build/pytex_file/pytex_file.py b/PyTeX/build/pytex_file/pytex_file.py
index 40a016d..110b848 100644
--- a/PyTeX/build/pytex_file/pytex_file.py
+++ b/PyTeX/build/pytex_file/pytex_file.py
@@ -1,28 +1,40 @@
-from typing import Optional, List
+from typing import Optional, List, Dict, Tuple
 
 from PyTeX.build.build_info import BasicBuildInfo
 from PyTeX.config import BasicFormattingConfig, GlobalPyTeXConfig
-from PyTeX.paths import RelativePath
 from .enums import PyTeXFileType
+from PyTeX.formatting.formatter import Formatter
+from ...paths import RelativePath
 
 
 class PyTeXSourceFile:
     def __init__(self):
         self._pytex_file_type: PyTeXFileType = None
         self._relative_path: RelativePath = None
+        self._formatter: Formatter = None
         self._build_info: Optional[BasicBuildInfo] = None
 
     @property
-    def relative_path(self) -> RelativePath:
+    def relative_path(self):
         return self._relative_path
 
     @property
     def pytex_file_type(self) -> PyTeXFileType:
         return self._pytex_file_type
 
-    def format(self) -> None:
-        pass
-
     @property
-    def provided_files(self) -> List[RelativePath]:
-        pass
+    def output_files(self) -> List[RelativePath]:
+        files = self._formatter.output_files
+        files = [
+            self._relative_path.with_name(filename)
+            for filename in files
+        ]
+        return files
+
+    def format(self) -> Optional[List[Tuple[RelativePath, Dict]]]:
+        configs = self._formatter.format(GlobalPyTeXConfig.target_root())
+        configs = [
+            (self._relative_path.with_name(filename), config)
+            for [filename, config] in configs
+        ]
+        return configs
diff --git a/PyTeX/config/global_config.py b/PyTeX/config/global_config.py
index 0c0c29e..327a5fa 100644
--- a/PyTeX/config/global_config.py
+++ b/PyTeX/config/global_config.py
@@ -2,6 +2,8 @@ from pathlib import Path, PurePath
 from typing import Optional
 from .formatting_config import BasicFormattingConfig
 
+from ..paths import PyTeXRootDirType
+
 
 class GlobalPyTeXConfig:
     _source_root: Optional[Path] = None
@@ -18,6 +20,8 @@ class GlobalPyTeXConfig:
 
     _allow_dirty: bool = False
 
+    _build_target: PyTeXRootDirType = None
+
     @classmethod
     def init(
             cls,
@@ -51,4 +55,17 @@ class GlobalPyTeXConfig:
 
     @classmethod
     def wrapper_dir(cls) -> PurePath:
-        return cls._wrapper_dir
+        raise NotImplementedError
+
+    @classmethod
+    def build_mode(cls) -> PyTeXRootDirType:
+        return cls._build_target
+
+    @classmethod
+    def target_root(cls) -> Path:
+        return {
+            PyTeXRootDirType.BUILD: cls.build_root(),
+            PyTeXRootDirType.DOC: cls.doc_root(),
+            PyTeXRootDirType.TEX_SOURCE: cls.tex_root(),
+            PyTeXRootDirType.PYTEX_SOURCE: cls.source_root()
+        }[cls._build_target]