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diff --git a/src/zope/tal/translationcontext.py b/src/zope/tal/translationcontext.py
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+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""Translation context object for the TALInterpreter's I18N support.
+
+The translation context provides a container for the information
+needed to perform translation of a marked string from a page template.
+
+$Id$
+"""
+DEFAULT_DOMAIN = "default"
+
+class TranslationContext(object):
+ """Information about the I18N settings of a TAL processor."""
+
+ def __init__(self, parent=None, domain=None, target=None, source=None):
+ if parent:
+ if not domain:
+ domain = parent.domain
+ if not target:
+ target = parent.target
+ if not source:
+ source = parent.source
+ elif domain is None:
+ domain = DEFAULT_DOMAIN
+
+ self.parent = parent
+ self.domain = domain
+ self.target = target
+ self.source = source