graphdb/src/main/java/com/orientechnologies/orient/graph/graphml/OGraphMLReader.java
public OGraphMLReader defineVertexAttributeStrategy(final String iAttributeName, final OGraphMLImportStrategy iStrategy) {
    vertexPropsStrategy.put(iAttributeName, iStrategy);
    return this;
  }
public OGraphMLReader defineVertexAttributeStrategy(final String iAttributeName, final OGraphMLImportStrategy iStrategy) {
    vertexPropsStrategy.put(iAttributeName, iStrategy);
    return this;
  }
Define custom strategy to use for vertex attribute.

@param iAttributeName
attribute name
@param iStrategy
strategy implementation