diff --git a/lib/Misc/Context.php b/lib/Misc/Context.php
index 1dd1a17..9263fa1 100644
--- a/lib/Misc/Context.php
+++ b/lib/Misc/Context.php
@@ -10,6 +10,7 @@ use JKingWeb\Arsse\Misc\Date;
 use JKingWeb\Arsse\Misc\ValueInfo;
 
 class Context {
+    public $not = null;
     public $reverse = false;
     public $limit = 0;
     public $offset = 0;
@@ -36,9 +37,16 @@ class Context {
     public $annotated = null;
     public $annotationTerms = null;
     public $searchTerms = null;
+    public $titleTerms = null;
+    public $authorTerms = null;
 
     protected $props = [];
 
+    public function __clone() {
+        // clone the negation context, if any
+        $this->not = $this->not ? clone $this->not : null;
+    }
+
     protected function act(string $prop, int $set, $value) {
         if ($set) {
             if (is_null($value)) {
@@ -198,4 +206,22 @@ class Context {
         }
         return $this->act(__FUNCTION__, func_num_args(), $spec);
     }
+
+    public function titleTerms(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanStringArray($spec);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
+    public function authorTerms(array $spec = null) {
+        if (isset($spec)) {
+            $spec = $this->cleanStringArray($spec);
+        }
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
+
+    public function not(self $spec = null) {
+        return $this->act(__FUNCTION__, func_num_args(), $spec);
+    }
 }
diff --git a/tests/cases/Misc/TestContext.php b/tests/cases/Misc/TestContext.php
index 902a6ba..12a9969 100644
--- a/tests/cases/Misc/TestContext.php
+++ b/tests/cases/Misc/TestContext.php
@@ -14,7 +14,7 @@ class TestContext extends \JKingWeb\Arsse\Test\AbstractTest {
     public function testVerifyInitialState() {
         $c = new Context;
         foreach ((new \ReflectionObject($c))->getMethods(\ReflectionMethod::IS_PUBLIC) as $m) {
-            if ($m->isConstructor() || $m->isStatic()) {
+            if ($m->isStatic() || strpos($m->name, "__") === 0) {
                 continue;
             }
             $method = $m->name;
@@ -51,11 +51,14 @@ class TestContext extends \JKingWeb\Arsse\Test\AbstractTest {
             'annotated' => true,
             'searchTerms' => ["foo", "bar"],
             'annotationTerms' => ["foo", "bar"],
+            'titleTerms' => ["foo", "bar"],
+            'authorTerms' => ["foo", "bar"],
+            'not' => (new Context)->subscription(5),
         ];
         $times = ['modifiedSince','notModifiedSince','markedSince','notMarkedSince'];
         $c = new Context;
         foreach ((new \ReflectionObject($c))->getMethods(\ReflectionMethod::IS_PUBLIC) as $m) {
-            if ($m->isConstructor() || $m->isStatic()) {
+            if ($m->isStatic() || strpos($m->name, "__") === 0) {
                 continue;
             }
             $method = $m->name;
@@ -84,7 +87,7 @@ class TestContext extends \JKingWeb\Arsse\Test\AbstractTest {
     }
 
     public function testCleanStringArrayValues() {
-        $methods = ["searchTerms", "annotationTerms"];
+        $methods = ["searchTerms", "annotationTerms", "titleTerms", "authorTerms"];
         $now = new \DateTime;
         $in = [1, 3.0, "ook", 0, true, false, null, $now, ""];
         $out = ["1", "3", "ook", "0", valueInfo::normalize($now, ValueInfo::T_STRING)];