The "data" directory is for data loading like this:
/- - - - - - - - - - - - - - - - - - - -
playsql
  |-data
     |-common
     |  |-xls
     |     |-10-master.xls
     |     |-defaultValueMap.dataprop
     |-ut
        |-xls
           |-20-member.xls  
           |-30-product.xls  
           |-defaultValueMap.dataprop
- - - - - - - - - -/

The format of a xls file is like this:
/- - - - - - - - - - - - - - - - - - - -

  /**
   * Line Feed ('\n'): A format effector which controls the movement of the printing position to the
   * next printing line. (Applicable also to display devices.) Where appropriate, this character may
   * have the meaning "New Line" (NL), a format effector which controls the movement of the printing
   * point to the first printing position on the next printing line. Use of this convention requires

          .put("empty", "")
          .put("1 char", "0")
          .put("1 word", "hello")
          .put("2 words", "hello world")
          .put("\\n line break", "hello\nworld")
          .put("\\r line break", "hello\rworld")
          .put("\\r\\n line break", "hello\r\nworld")
          .put("\\n at EOF", "hello\nworld\n")
          .put("\\r at EOF", "hello\nworld\r")
          .put("lorem ipsum", LOREM_IPSUM)

 * integrated with Fess. Implementations handle specific SSO protocols like SAML,
 * OAuth, SPNEGO, or other authentication mechanisms. Each authenticator is responsible
 * for obtaining login credentials, resolving user information, and managing SSO
 * lifecycle operations like logout and metadata exchange.
 */
public interface SsoAuthenticator {

    /**

        <executions>
          <execution>
            <id>attach-docs</id>
          </execution>
          <execution>
            <id>generate-javadoc-site-report</id>
            <phase>site</phase>
            <goals><goal>javadoc</goal></goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

which generates classes corresponding your tables,
for example, entities, condition-beans to specified
directories by DBFlute properties on "dfprop" directory.

Generated structures (directories and classes) are like this:
/- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
allcommon : classes bridging to DBFlute Runtime
bsbhv     : base behaviors
bsentity  : base entities
cbean     : condition-beans (both base and extended)

        }
        return hash;
    }

    /**
     * Appends line numbers to each line of content with a given prefix.
     * Useful for debugging and displaying content with line references.
     *
     * @param prefix the prefix to add before each line number
     * @param content the content to add line numbers to
     * @return the content with line numbers prepended, or empty string if content is blank
     */

      }
    }

    return true
  }

  @Throws(IOException::class)
  private fun readEmptyLine(source: BufferedSource) {
    val line = source.readUtf8LineStrict()
    check(line.isEmpty()) { "Expected empty but was: $line" }
  }

  public override fun toString(): String {
    val socketAddress = socketAddress_
    return when {
      closed -> "MockWebServer{closed}"

/**
 * {@link FluentFuture} that forwards all calls to a delegate.
 *
 * <h3>Extension</h3>
 *
 * If you want a class like {@code FluentFuture} but with extra methods, we recommend declaring your
 * own subclass of {@link ListenableFuture}, complete with a method like {@link #from} to adapt an
 * existing {@code ListenableFuture}, implemented atop a {@link ForwardingListenableFuture} that

    return result
  }
}

internal data class AlgorithmIdentifier(
  /** An OID string like "1.2.840.113549.1.1.11" for sha256WithRSAEncryption. */
  val algorithm: String,
  /** Parameters of a type implied by [algorithm]. */
  val parameters: Any?,
)

internal data class AttributeTypeAndValue(
  /** An OID string like "2.5.4.11" for organizationalUnitName. */
  val type: String,
  val value: Any?,
)