GCC compile error for templated class method [duplicate]

I would like help understanding this gcc compilation error. The following c++ code is for what I thought was a relatively simple class which will hold some data and use a metadata class (which will act like a traits class).

template < class METADATA_TYPE, class VALUE_TYPE>
class DataMetadata
{
public:
        DataMetadata() {}
        DataMetadata(VALUE_TYPE v) : m_v(v) {}
        template<class U, class V>
        DataMetadata(const DataMetadata<U, V> &other)
        {
                m_v = other.value<METADATA_TYPE>();
        }
        template<class U, class V>
        void assignFrom(const DataMetadata<U, V> &other)
        {
                m_v = other.value<METADATA_TYPE>();
        }
        template <class REQUIRED_METADATA_TYPE>
        VALUE_TYPE value() const
        {
                //some conversion will happen here based on METADATA_TYPE AND REQUIRED_METADATA_TYPE
                //for the purposes of creating a minimal example it has been removed
                return m_v;
        }
private:
        VALUE_TYPE m_v;
};

I put the above code in a file MetaMinimal.cpp, and compiled with gcc giving the following compile errors

$ gcc MetaMinimal.cpp
MetaMinimal.cpp: In constructor ‘DataMetadata<METADATA_TYPE, VALUE_TYPE>::DataMetadata(const DataMetadata<U, V>&)’:
MetaMinimal.cpp:10:48: error: expected primary-expression before ‘>’ token
                 m_v = other.value<METADATA_TYPE>();
                                                ^
MetaMinimal.cpp:10:50: error: expected primary-expression before ‘)’ token
                 m_v = other.value<METADATA_TYPE>();
                                                  ^
MetaMinimal.cpp: In member function ‘void DataMetadata<METADATA_TYPE, VALUE_TYPE>::assignFrom(const DataMetadata<U, V>&
’:
MetaMinimal.cpp:15:48: error: expected primary-expression before ‘>’ token
                 m_v = other.value<METADATA_TYPE>();
                                                ^
MetaMinimal.cpp:15:50: error: expected primary-expression before ‘)’ token
                 m_v = other.value<METADATA_TYPE>();
                                                  ^

Googling the error gives a number of things regarding passing classes/types into functions instead of objects/values or missing brackets. But I can't see how that this applies here.