legacy/src/main/java/thredds/catalog/dl/DIFWriter.java
public boolean isDatasetUseable(InvDataset ds, StringBuilder sbuff) {
    boolean ok = true;
    sbuff.append("Dataset " + ds.getName() + " id = " + ds.getID() + ": ");

    if (!ds.isHarvest()) {
      ok = false;
      sbuff.append("Dataset " + ds.getName() + " id = " + ds.getID() + " has harvest = false\n");
    }

    if (ds.getName() == null) {
      ok = false;
      sbuff.append(" missing Name field\n");
    }

    if (ds.getUniqueID() == null) {
      ok = false;
      sbuff.append(" missing ID field\n");
    }

    ThreddsMetadata.Variables vs = ds.getVariables("DIF");
    if ((vs == null) || (vs.getVariableList().size() == 0))
      vs = ds.getVariables("GRIB-1");
    if ((vs == null) || (vs.getVariableList().size() == 0))
      vs = ds.getVariables("GRIB-2");
    if ((vs == null) || (vs.getVariableList().size() == 0)) {
      ok = false;
      sbuff.append(" missing Variables with DIF or GRIB compatible vocabulary\n");
    }

    List list = ds.getPublishers();
    if ((list == null) || (list.size() == 0)) {
      ok = false;
      sbuff.append(" must have publisher element that defines the data center\n");
    }

    String summary = ds.getDocumentation("summary");
    if (summary == null) {
      ok = false;
      sbuff.append(" must have documentation element of type summary\n");
    }

    sbuff.append(" useable= "+ok+"\n");
    return ok;
  }
public boolean isDatasetUseable(InvDataset ds, StringBuilder sbuff) {
    boolean ok = true;
    sbuff.append("Dataset " + ds.getName() + " id = " + ds.getID() + ": ");

    if (!ds.isHarvest()) {
      ok = false;
      sbuff.append("Dataset " + ds.getName() + " id = " + ds.getID() + " has harvest = false\n");
    }

    if (ds.getName() == null) {
      ok = false;
      sbuff.append(" missing Name field\n");
    }

    if (ds.getUniqueID() == null) {
      ok = false;
      sbuff.append(" missing ID field\n");
    }

    ThreddsMetadata.Variables vs = ds.getVariables("DIF");
    if ((vs == null) || (vs.getVariableList().size() == 0))
      vs = ds.getVariables("GRIB-1");
    if ((vs == null) || (vs.getVariableList().size() == 0))
      vs = ds.getVariables("GRIB-2");
    if ((vs == null) || (vs.getVariableList().size() == 0)) {
      ok = false;
      sbuff.append(" missing Variables with DIF or GRIB compatible vocabulary\n");
    }

    List list = ds.getPublishers();
    if ((list == null) || (list.size() == 0)) {
      ok = false;
      sbuff.append(" must have publisher element that defines the data center\n");
    }

    String summary = ds.getDocumentation("summary");
    if (summary == null) {
      ok = false;
      sbuff.append(" must have documentation element of type summary\n");
    }

    sbuff.append(" useable= "+ok+"\n");
    return ok;
  }
See if a dataset is harvestable to a DIF record.

@param ds check this dataset.
@param sbuff  put status messages here.
@return true if a DIF record can be written