src/main/java/org/codelibs/fess/
├── FessBoot.java              # Application entry point
├── app/
│   ├── web/                   # User-facing controllers
│   ├── web/admin/             # Admin controllers
│   ├── service/               # Business logic
│   └── job/                   # Background jobs
├── api/                       # REST API endpoints
├── opensearch/                # OpenSearch integration

        data.putValue("title", "Important Document");
        data.putValue("author", "Jane Smith");
        data.putValue("date", "2025-01-15");

        // Add multiple values
        String[] keywords = { "business", "report", "analysis", "2025" };
        data.putValues("keywords", keywords);

        String[] passwords = { "secret123", "pass456" };
        data.putValues(ExtractData.FILE_PASSWORDS, passwords);

     */
    protected ExecJob() {
        // Default constructor
    }

    /**
     * Executes the job and returns the result as a string.
     * This method contains the main business logic for the specific job implementation.
     *
     * @return the execution result message or summary
     */
    public abstract String execute();

    /**

labels.teletexTerminalIdentifier=Teletex Terminal Identifier
labels.user_x121Address=x121Address
labels.x121Address=x121Address
labels.user_businessCategory=Business Category
labels.businessCategory=Business Category
labels.user_registeredAddress=Registered Address
labels.registeredAddress=Registered Address
labels.user_displayName=Display Name
labels.displayName=Display Name

labels.teletexTerminalIdentifier=Teletex Terminal Identifier
labels.user_x121Address=x121Address
labels.x121Address=x121Address
labels.user_businessCategory=Business Category
labels.businessCategory=Business Category
labels.user_registeredAddress=Registered Address
labels.registeredAddress=Registered Address
labels.user_displayName=Display Name
labels.displayName=Display Name

    public static final String LABELS_X121_ADDRESS = "{labels.x121Address}";

    /** The key of the message: Business Category */
    public static final String LABELS_user_businessCategory = "{labels.user_businessCategory}";

    /** The key of the message: Business Category */
    public static final String LABELS_BUSINESS_CATEGORY = "{labels.businessCategory}";

ldap.attr.city=l
# LDAP attribute for teletex terminal identifier.
ldap.attr.teletexTerminalIdentifier=teletexTerminalIdentifier
# LDAP attribute for X.121 address.
ldap.attr.x121Address=x121Address
# LDAP attribute for business category.
ldap.attr.businessCategory=businessCategory
# LDAP attribute for registered address.
ldap.attr.registeredAddress=registeredAddress
# LDAP attribute for display name.
ldap.attr.displayName=displayName

     */
    String getLdapAttrX121Address();

    /**
     * Get the value for the key 'ldap.attr.businessCategory'. <br>
     * The value is, e.g. businessCategory <br>
     * comment: LDAP attribute for business category.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getLdapAttrBusinessCategory();

    /**