cdm/src/main/java/thredds/client/catalog/Service.java
public boolean isRelativeBase() {
    if (getType() == ServiceType.Compound)
      return true;

    try {
      URI uri = new java.net.URI(base);
      return !uri.isAbsolute();
    } catch (java.net.URISyntaxException e) {
      throw new IllegalArgumentException(e.getMessage());
    }
  }
public boolean isRelativeBase() {
    if (getType() == ServiceType.Compound)
      return true;

    try {
      URI uri = new java.net.URI(base);
      return !uri.isAbsolute();
    } catch (java.net.URISyntaxException e) {
      throw new IllegalArgumentException(e.getMessage());
    }
  }
See if the service Base is reletive
@return true if the service Base is reletive