* pattern rather than an exact match term.
     */
    protected String regexPrefix = "regex:";

    /**
     * Placeholder string used in regex-based related content templates.
     * This placeholder is replaced with the actual search query when
     * a regex pattern matches the query.
     */
    protected String queryPlaceHolder = "__QUERY__";

    /**

     * @throws JobProcessingException if the script explicitly throws this exception
     *         (allows scripts to signal job-specific errors that should propagate)
     */
    @Override
    public Object evaluate(final String template, final Map<String, Object> paramMap) {
        // Null-safety: return null for blank templates

├── fess_label_*.properties    # UI labels (i18n)
├── fess_message_*.properties  # Validation messages (i18n)
└── fess_indices/              # OpenSearch index mappings

src/main/webapp/WEB-INF/view/  # JSP templates
```

## DBFlute Code Generation

DBFlute generates type-safe data access code for OpenSearch indices:

```bash
mvn dbflute:freegen
```

Generated code:

- **Special cases**: Kurdish uses `fess_label_ckb_IQ.properties`

## Step-by-Step Guide

### 1. Create Language Resource Files

Copy the base English files as templates:

```bash
cd src/main/resources

# Copy label file (~1,056 translation entries)
cp fess_label_en.properties fess_label_[your_locale].properties

# Copy message file (~200 translation entries)

            { "aliases", "allocation", "count", "fielddata", "health", "indices", "master", "nodeattrs", "nodes", "pending_tasks",
                    "plugins", "recovery", "repositories", "thread_pool", "shards", "segments", "snapshots", "templates" };

    // ===================================================================================
    //                                                                           Attribute
    //

    /**

/**
 * Utility class providing static functions for Fess JSP/JSTL expressions and tag libraries.
 * This class contains various helper methods for formatting, parsing, and manipulating data
 * in Fess web templates, including date formatting, localization, file operations, and
 * query parameter handling.
 *
 * @since 1.0
 */
public class FessFunctions {
    /** Logger instance for this class */

            doc.put(HL_CACHE, StringUtil.EMPTY);
        }

        try {
            final Template template = handlebars.compile(cacheTemplateName);
            final Context hbsContext = Context.newContext(doc);
            return template.apply(hbsContext);
        } catch (final Exception e) {
            logger.warn("Failed to create a cache response.", e);
        }

    /**
     * Convert the value.
     * @param scriptType The script type.
     * @param template The template.
     * @param paramMap The parameters.
     * @return The converted value.
     */
    protected Object convertValue(final String scriptType, final String template, final Map<String, Object> paramMap) {
        if (StringUtil.isEmpty(template)) {
            return StringUtil.EMPTY;
        }

     * Puts data into the result data map after processing it through a template script.
     * The template is evaluated using the specified script engine with the value and context.
     *
     * @param dataMap the data map to modify
     * @param key the key to store the processed value under
     * @param value the original value to process
     * @param template the template script to evaluate

				"application/vnd.oasis.opendocument.presentation",
				"application/vnd.oasis.opendocument.presentation-template",
				"application/vnd.oasis.opendocument.spreadsheet",
				"application/vnd.oasis.opendocument.spreadsheet-template",
				"application/vnd.oasis.opendocument.text",
				"application/vnd.oasis.opendocument.text-master",
				"application/vnd.oasis.opendocument.text-template",