opendap/src/main/java/opendap/dap/AttributeTable.java
public final void appendAttribute(String clearname, int type, String value)
            throws DASException {
        appendAttribute(clearname, type, value, true);
    }
public final void appendAttribute(String clearname, int type, String value)
            throws DASException {
        appendAttribute(clearname, type, value, true);
    }
Adds an attribute to the table.  If the given name already
refers to an attribute, and the attribute has a vector value,
the given value is appended to the attribute vector.  Calling
this function repeatedly is the way to create an attribute
vector.
<p/>
The function throws an exception if the attribute is a
container, or if the type of the input value does not match the
existing attribute's type.  Use the <code>appendContainer</code>
method to add container attributes.

@param clearname  The name of the attribute to add or modify.
@param type  The type code of the attribute to add or modify.
@param value The value to add to the attribute table.
@throws AttributeExistsException   thrown if an Attribute with the same
name, but a different type was previously defined.
@throws AttributeBadValueException thrown if the value is not a legal
member of type
@see AttributeTable#appendContainer(String)