text: import re
  
  
  # Metadata keys for work with studio and project overrides
  M_OVERRIDEN_KEY = "__overriden_keys__"
  # Metadata key for storing information about environments
  M_ENVIRONMENT_KEY = "__environment_keys__"
  # Metadata key for storing dynamic created labels
  M_DYNAMIC_KEY_LABEL = "__dynamic_keys_labels__"
  
  METADATA_KEYS = (
      M_OVERRIDEN_KEY,
      M_ENVIRONMENT_KEY,
      M_DYNAMIC_KEY_LABEL
  )
  
  # Keys where studio's system overrides are stored
  GLOBAL_SETTINGS_KEY = "global_settings"
  SYSTEM_SETTINGS_KEY = "system_settings"
  PROJECT_SETTINGS_KEY = "project_settings"
  PROJECT_ANATOMY_KEY = "project_anatomy"
  LOCAL_SETTING_KEY = "local_settings"
  
  # Schema hub names
  SCHEMA_KEY_SYSTEM_SETTINGS = "system_schema"
  SCHEMA_KEY_PROJECT_SETTINGS = "projects_schema"
  
  DEFAULT_PROJECT_KEY = "__default_project__"
  
  KEY_ALLOWED_SYMBOLS = "a-zA-Z0-9-_ "
  KEY_REGEX = re.compile(r"^[{}]+$".format(KEY_ALLOWED_SYMBOLS))
  
  
  __all__ = (
      "M_OVERRIDEN_KEY",
      "M_ENVIRONMENT_KEY",
      "M_DYNAMIC_KEY_LABEL",
  
      "METADATA_KEYS",
  
      "SYSTEM_SETTINGS_KEY",
      "PROJECT_SETTINGS_KEY",
      "PROJECT_ANATOMY_KEY",
      "LOCAL_SETTING_KEY",
  
      "SCHEMA_KEY_SYSTEM_SETTINGS",
      "SCHEMA_KEY_PROJECT_SETTINGS",
  
      "DEFAULT_PROJECT_KEY",
  
      "KEY_ALLOWED_SYMBOLS",
      "KEY_REGEX"
  )
  