diff --git a/R/KorAPQuery.R b/R/KorAPQuery.R
index 85f1e8f..abd1734 100644
--- a/R/KorAPQuery.R
+++ b/R/KorAPQuery.R
@@ -45,7 +45,8 @@
   "initialize", "KorAPQuery",
   function(.Object, korapConnection = NULL, request = NULL, vc = "", totalResults = 0, nextStartIndex = 0, fields = c(
              "corpusSigle", "textSigle", "pubDate", "pubPlace",
-             "availability", "textClass", "snippet", "tokens"
+             "availability", "textClass", "dmozDomain", "wikiDomain",
+             "snippet", "tokens"
            ),
            requestUrl = "", webUIRequestUrl = "", apiResponse = NULL, hasMoreMatches = FALSE, collectedMatches = NULL) {
     .Object <- callNextMethod()
@@ -111,7 +112,7 @@
 #'   \item{**Publication info**:}{`author`, `editor`, `title`, `docTitle`, `corpusTitle` - authorship and titles}
 #'   \item{**Temporal data**:}{`pubDate`, `creationDate` - when text was published/created}
 #'   \item{**Publication details**:}{`pubPlace`, `publisher`, `reference` - where/how published}
-#'   \item{**Text classification**:}{`textClass`, `textType`, `textTypeArt`, `textDomain`, `textColumn` - topic domain, genre, text type and column}
+#'   \item{**Text classification**:}{`textClass`, `dmozDomain`, `wikiDomain`, `textType`, `textTypeArt`, `textDomain`, `textColumn` - topic domain, genre, text type and column}
 #'   \item{**Adminstrative and technical info**:}{`corpusEditor`, `availability`, `language`, `foundries` - access rights and annotations}
 #'   \item{**Content data**:}{`snippet`, `tokens`, `tokenSource`, `externalLink` - actual text content, tokenization, and link to source text}
 #'   \item{**System data**:}{`indexCreationDate`, `indexLastModified` - corpus indexing info}
@@ -206,6 +207,8 @@
              "pubPlace",
              "availability",
              "textClass",
+             "dmozDomain",
+             "wikiDomain",
              "snippet",
              "tokens"
            ),
diff --git a/man/corpusQuery-KorAPConnection-method.Rd b/man/corpusQuery-KorAPConnection-method.Rd
index e26ad13..06356fa 100644
--- a/man/corpusQuery-KorAPConnection-method.Rd
+++ b/man/corpusQuery-KorAPConnection-method.Rd
@@ -19,7 +19,7 @@
   metadataOnly = TRUE,
   ql = if (missing(KorAPUrl)) "poliqarp" else httr2::url_parse(KorAPUrl)$query$ql,
   fields = c("corpusSigle", "textSigle", "pubDate", "pubPlace", "availability",
-    "textClass", "snippet", "tokens"),
+    "textClass", "dmozDomain", "wikiDomain", "snippet", "tokens"),
   accessRewriteFatal = TRUE,
   verbose = kco@verbose,
   expand = length(vc) != length(query),
@@ -52,7 +52,7 @@
 \item{\strong{Publication info}:}{\code{author}, \code{editor}, \code{title}, \code{docTitle}, \code{corpusTitle} - authorship and titles}
 \item{\strong{Temporal data}:}{\code{pubDate}, \code{creationDate} - when text was published/created}
 \item{\strong{Publication details}:}{\code{pubPlace}, \code{publisher}, \code{reference} - where/how published}
-\item{\strong{Text classification}:}{\code{textClass}, \code{textType}, \code{textTypeArt}, \code{textDomain}, \code{textColumn} - topic domain, genre, text type and column}
+\item{\strong{Text classification}:}{\code{textClass}, \code{dmozDomain}, \code{wikiDomain}, \code{textType}, \code{textTypeArt}, \code{textDomain}, \code{textColumn} - topic domain, genre, text type and column}
 \item{\strong{Adminstrative and technical info}:}{\code{corpusEditor}, \code{availability}, \code{language}, \code{foundries} - access rights and annotations}
 \item{\strong{Content data}:}{\code{snippet}, \code{tokens}, \code{tokenSource}, \code{externalLink} - actual text content, tokenization, and link to source text}
 \item{\strong{System data}:}{\code{indexCreationDate}, \code{indexLastModified} - corpus indexing info}
diff --git a/man/initialize-KorAPQuery-method.Rd b/man/initialize-KorAPQuery-method.Rd
index beb44ad..79e9df4 100644
--- a/man/initialize-KorAPQuery-method.Rd
+++ b/man/initialize-KorAPQuery-method.Rd
@@ -12,7 +12,7 @@
   totalResults = 0,
   nextStartIndex = 0,
   fields = c("corpusSigle", "textSigle", "pubDate", "pubPlace", "availability",
-    "textClass", "snippet", "tokens"),
+    "textClass", "dmozDomain", "wikiDomain", "snippet", "tokens"),
   requestUrl = "",
   webUIRequestUrl = "",
   apiResponse = NULL,
diff --git a/tests/testthat/test-corpusQuery.R b/tests/testthat/test-corpusQuery.R
index b5b73ee..7ef9e00 100644
--- a/tests/testthat/test-corpusQuery.R
+++ b/tests/testthat/test-corpusQuery.R
@@ -70,15 +70,15 @@
   expect_equal(matches$matchStart[1], matches$matchEnd[1])
 })
 
-test_that("fetchAll fetches textClass metadatum", {
+test_that("fetchAll fetches dmozDomain metadatum", {
   skip_if_offline()
   q <- KorAPConnection(accessToken = NULL, verbose = TRUE) %>%
     corpusQuery("Ameisenplage", vc = "pubDate since 2014")
   expectedResults <- q@totalResults
   matches <- fetchAll(q)@collectedMatches
-  expect_true(any(grepl("wissenschaft ", matches$textClass)))
-  expect_true(any(grepl(" populaerwissenschaft", matches$textClass)))
-  expect_true(any(grepl("kultur literatur", matches$textClass)))
+  # DeReKo-2026 renamed textClass to dmozDomain (space separated)
+  expect_true(any(grepl("wissenschaft ", matches$dmozDomain)))
+  expect_true(any(grepl(" populaerwissenschaft", matches$dmozDomain)))
 })
 
 test_that("Uncached query for non-matching search string return 0 results", {
diff --git a/tests/testthat/test-textMetadata.R b/tests/testthat/test-textMetadata.R
index 13c754a..6a44cd6 100644
--- a/tests/testthat/test-textMetadata.R
+++ b/tests/testthat/test-textMetadata.R
@@ -54,8 +54,10 @@
   kco <- KorAPConnection(accessToken = NULL)
   m <- textMetadata(kco, "WUD17/B96/57558")
 
-  expect_true("staat-gesellschaft\\tbiographien-interviews" == m$textClass[1] ||
-              grepl("\\t", m$textClass[1]),
+  # DeReKo-2026 renamed textClass to dmozDomain (list valued); list
+  # valued fields are flattened tab separated
+  expect_true("staat-gesellschaft\\tbiographien-interviews" == m$dmozDomain[1] ||
+              grepl("\\t", m$dmozDomain[1]),
               "multiple text classes / domains should be tab separated")
 })