# Specifications for Currency Amounts Only positive currency amounts are utilized within the message. Negative currency amounts are not used. **Special Characters** The HCD Content Retrieval Interface supports multi-byte languages, allowing the inclusion of special characters ranging from simple accents, such as umlauts, to more complex character sets. This ensures compatibility with a wide range of languages and symbols. Suppliers can reference the **Unicode Code Chart for Symbols and Special Punctuation** to identify the requirements and encoding for each character. This resource helps ensure that all special characters are handled correctly in the content .