diff --git a/package.json b/package.json
index 9101f72..4f2df42 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
   "dependencies": {
     "@joepie91/unreachable": "^1.0.0",
     "@promistream/decode-string": "^0.1.0",
-    "@promistream/from-node-stream": "^0.1.0",
+    "@promistream/from-node-stream": "^0.1.3",
+    "@promistream/parse-sitemap": "^0.1.0",
     "@promistream/pipe": "^0.1.4",
     "@promistream/simple-sink": "^0.1.1",
     "bhttp": "^1.2.8",
diff --git a/yarn.lock b/yarn.lock
index 0fc2de1..edad139 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -91,10 +91,10 @@
     default-value "^1.0.0"
     error-chain "^0.1.0"
 
-"@promistream/from-node-stream@^0.1.0":
-  version "0.1.1"
-  resolved "https://registry.yarnpkg.com/@promistream/from-node-stream/-/from-node-stream-0.1.1.tgz#053ffbe41394cf7c986ccd73a5ab4f3fc700372e"
-  integrity sha512-Sd0AtyaTTJwc/GYurNwHJ3RrS/30hdz0VLK3inZPqPs6vfnInnzwxIjExros7jzknIa6OjnoHSuuIMf21mns9g==
+"@promistream/from-node-stream@^0.1.3":
+  version "0.1.3"
+  resolved "https://registry.yarnpkg.com/@promistream/from-node-stream/-/from-node-stream-0.1.3.tgz#a439a74670a53de3d7ab968d9c93bc9d1d0c589c"
+  integrity sha512-ue1uxZ0UMF3tGMGwV61WOy1Cl9eGQPqwlo54uIUtGRgl3fsSgkWsgV1VxN9jPMtRejTAm3BxDbvHcOdybZwO3Q==
   dependencies:
     "@joepie91/unreachable" "^1.0.0"
     "@promistream/buffer" "^0.1.0"
@@ -103,7 +103,7 @@
     "@promistream/pipe" "^0.1.1"
     "@promistream/propagate-abort" "^0.1.3"
     "@promistream/propagate-peek" "^0.1.0"
-    "@promistream/simple-sink" "^0.1.0"
+    "@promistream/simple-sink" "^0.2.0"
     "@promistream/simple-source" "^0.1.1"
     bluebird "^3.7.2"
     debug "^4.3.1"
@@ -136,7 +136,19 @@
     debug "^4.3.1"
     p-pause "^0.1.0"
 
-"@promistream/map@^0.1.1":
+"@promistream/map-filter@^0.1.0":
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/@promistream/map-filter/-/map-filter-0.1.0.tgz#2bb4988b386a2e520f2d1cc1b6f7d333a24266d0"
+  integrity sha512-kHO1NvwuxEB4tTZ9b4XR9iBBJftHxT/857KbkWRe0kSt6zvFIVYHSzmKz/cipUx1f2FrmpQC+R6R84MlHD+ugQ==
+  dependencies:
+    "@promistream/propagate-abort" "^0.1.6"
+    "@promistream/propagate-peek" "^0.1.1"
+    "@validatem/core" "^0.3.15"
+    "@validatem/is-function" "^0.1.0"
+    "@validatem/required" "^0.1.1"
+    bluebird "^3.7.2"
+
+"@promistream/map@^0.1.0", "@promistream/map@^0.1.1":
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/@promistream/map/-/map-0.1.1.tgz#2f771372e5d1dd12f41b6efd57874014d406f123"
   integrity sha512-ggyNqWlvNXVY9Gf/pLUgbHROK8mEqu46hbpJftmN9etPr724YPhL+vxA7+9b6bBmTLAU1Tw4Th3BWG5EHVBn1g==
@@ -148,6 +160,37 @@
     "@validatem/required" "^0.1.1"
     bluebird "^3.5.4"
 
+"@promistream/parse-sitemap@^0.1.0":
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/@promistream/parse-sitemap/-/parse-sitemap-0.1.0.tgz#0d8860c4880d41611055a52cc2e73ac856caa2d5"
+  integrity sha512-UKrnXQg6llOhAJ+Z0YlDf+UoLP8pwWDKOPNcOgYXm2TSvYqmSfOuPrJaXKb6m/RnkaPwHUW0U0quLv7Vl4TKJQ==
+  dependencies:
+    "@joepie91/consumable" "^1.0.1"
+    "@promistream/map-filter" "^0.1.0"
+    "@promistream/parse-xml" "^0.1.0"
+    "@promistream/pipe" "^0.1.4"
+
+"@promistream/parse-xml@^0.1.0":
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/@promistream/parse-xml/-/parse-xml-0.1.0.tgz#78b0da6bde76b5843738efdb5a385edc4b6f876b"
+  integrity sha512-hMEr+8h7wSrbhZnnejH3BVDtI09TjjpgdsF9Ip+ORrtoaZ1rDR68zHeK/HsikNBifM6o9EIsAly237MrIMY/dA==
+  dependencies:
+    "@joepie91/consumable" "^1.0.1"
+    "@promistream/buffer" "^0.1.0"
+    "@promistream/last-will" "^0.1.0"
+    "@promistream/map" "^0.1.0"
+    "@promistream/pipe" "^0.1.1"
+    "@validatem/allow-extra-properties" "^0.1.0"
+    "@validatem/array-of" "^0.1.2"
+    "@validatem/core" "^0.3.13"
+    "@validatem/default-to" "^0.1.0"
+    "@validatem/is-string" "^1.0.0"
+    "@validatem/required" "^0.1.1"
+    bluebird "^3.7.2"
+    debug "^4.3.1"
+    p-event "^4.2.0"
+    saxes "^5.0.1"
+
 "@promistream/pipe@^0.1.1", "@promistream/pipe@^0.1.4":
   version "0.1.4"
   resolved "https://registry.yarnpkg.com/@promistream/pipe/-/pipe-0.1.4.tgz#ef05fe582a33768c7eb56ad20635e1b7b48ac95b"
@@ -172,7 +215,7 @@
   resolved "https://registry.yarnpkg.com/@promistream/propagate-peek/-/propagate-peek-0.1.1.tgz#c7dd69efcd894c408d7a3e9713b6a9036f70a501"
   integrity sha512-4xfkSmtPQzlvL4+KCquPHX7sPXiAACGJac/y7fB3Sv6ZKXAT/cjTfms1nEjlDGn1nroN0MzReBza2HnpF59deg==
 
-"@promistream/simple-sink@^0.1.0", "@promistream/simple-sink@^0.1.1":
+"@promistream/simple-sink@^0.1.1":
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/@promistream/simple-sink/-/simple-sink-0.1.1.tgz#e3808179102ffe4bc10d70d681f19c649e1f3811"
   integrity sha512-M6dQMUIPjFTRB+xIwBMqIrPghWORoreGoNAl2F/5oshBlX6+X2F+RAeUuz6plDymwq2eoVL5pvSUR4zYdMdRjQ==
@@ -188,6 +231,22 @@
     "@validatem/wrap-value-as-option" "^0.1.0"
     bluebird "^3.5.4"
 
+"@promistream/simple-sink@^0.2.0":
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/@promistream/simple-sink/-/simple-sink-0.2.2.tgz#9ecfef4084d5dc62438f67e437d807a811d9c196"
+  integrity sha512-wiNuwq1gigmEDaNXduP7XcGQUku6J7ah316lyCdPbi3cxNTNdLKCMlWN3VLuldrmksHwjVt51hVK1HugZjwgMw==
+  dependencies:
+    "@promistream/is-aborted" "^0.1.1"
+    "@promistream/is-end-of-stream" "^0.1.1"
+    "@promistream/propagate-abort" "^0.1.6"
+    "@promistream/propagate-peek" "^0.1.1"
+    "@validatem/core" "^0.3.11"
+    "@validatem/is-function" "^0.1.0"
+    "@validatem/required" "^0.1.1"
+    "@validatem/wrap-value-as-option" "^0.1.0"
+    bluebird "^3.5.4"
+    result-buffer "^0.1.0"
+
 "@promistream/simple-source@^0.1.1":
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/@promistream/simple-source/-/simple-source-0.1.3.tgz#8139ed088f8249eb9a93287fc04213008325cf06"
@@ -322,6 +381,32 @@
     supports-color "^7.1.0"
     syncpipe "^1.0.0"
 
+"@validatem/core@^0.3.13":
+  version "0.3.16"
+  resolved "https://registry.yarnpkg.com/@validatem/core/-/core-0.3.16.tgz#0852d49c0f45d8938bb530696f735b3809621d34"
+  integrity sha512-s5KqnQhQMg6QTa3X6ceVCr6stAsKN8GqdEgkiHpI0fJSO2JFxpwIi9BjeB++zbAQ4xd4SLwcUz+Ujg7xE0WHVA==
+  dependencies:
+    "@validatem/annotate-errors" "^0.1.2"
+    "@validatem/any-property" "^0.1.0"
+    "@validatem/error" "^1.0.0"
+    "@validatem/match-validation-error" "^0.1.0"
+    "@validatem/match-versioned-special" "^0.1.0"
+    "@validatem/match-virtual-property" "^0.1.0"
+    "@validatem/normalize-rules" "^0.1.0"
+    "@validatem/required" "^0.1.0"
+    "@validatem/validation-result" "^0.1.1"
+    "@validatem/virtual-property" "^0.1.0"
+    as-expression "^1.0.0"
+    assure-array "^1.0.0"
+    create-error "^0.3.1"
+    default-value "^1.0.0"
+    execall "^2.0.0"
+    flatten "^1.0.3"
+    indent-string "^4.0.0"
+    is-arguments "^1.0.4"
+    supports-color "^7.1.0"
+    syncpipe "^1.0.0"
+
 "@validatem/default-to@^0.1.0":
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/@validatem/default-to/-/default-to-0.1.0.tgz#62766a3ca24d2f61a96c713bcb629a5b3c6427c5"
@@ -413,6 +498,14 @@
     "@validatem/error" "^1.0.0"
     is-string "^1.0.5"
 
+"@validatem/is-string@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@validatem/is-string/-/is-string-1.0.0.tgz#cc4a464f3bbc797aa7c7e124d11e5959b67636fd"
+  integrity sha512-j6fXuTgOrq94RbjSWeOzeKEcZ2ftnrG2ZHU16cGwC+gYn/st8JECXEpxSeZG8PJpn7V+PFaZeCKW9sJhonE1pA==
+  dependencies:
+    "@validatem/error" "^1.0.0"
+    is-string "^1.0.5"
+
 "@validatem/match-special@^0.1.0":
   version "0.1.0"
   resolved "https://registry.yarnpkg.com/@validatem/match-special/-/match-special-0.1.0.tgz#4e0c28f1aee5bf53c1ef30bbf8c755d4946ae0ff"
@@ -1810,6 +1903,11 @@ responselike@^2.0.0:
   dependencies:
     lowercase-keys "^2.0.0"
 
+result-buffer@^0.1.0:
+  version "0.1.0"
+  resolved "https://registry.yarnpkg.com/result-buffer/-/result-buffer-0.1.0.tgz#8b7ad5bc6c3e1352415e724194198edff90d6f36"
+  integrity sha512-asH3ChOeuCXK4LXhvtAINa6qj5TWuQ353wslgUwqrx6Zb0+WhI5coJ6sESF/IOuaAoHdf9st2Mlv7XmREUHaNw==
+
 ret@~0.1.10:
   version "0.1.15"
   resolved "https://registry.yarnpkg.com/ret/-/ret-0.1.15.tgz#b8a4825d5bdb1fc3f6f53c2bc33f81388681c7bc"
@@ -1839,6 +1937,13 @@ safe-buffer@~5.1.0, safe-buffer@~5.1.1:
   resolved "https://registry.yarnpkg.com/safe-buffer/-/safe-buffer-5.1.2.tgz#991ec69d296e0313747d59bdfd2b745c35f8828d"
   integrity sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==
 
+saxes@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/saxes/-/saxes-5.0.1.tgz#eebab953fa3b7608dbe94e5dadb15c888fa6696d"
+  integrity sha512-5LBh1Tls8c9xgGjw3QrMwETmTMVk0oFgvrFSvWx62llR2hcEInrKNZ2GZCCuuy2lvWrdl5jhbpeqc5hRYKFOcw==
+  dependencies:
+    xmlchars "^2.2.0"
+
 semver-compare@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/semver-compare/-/semver-compare-1.0.0.tgz#0dee216a1c941ab37e9efb1788f6afc5ff5537fc"
@@ -2072,6 +2177,11 @@ wrappy@1:
   resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
   integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=
 
+xmlchars@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/xmlchars/-/xmlchars-2.2.0.tgz#060fe1bcb7f9c76fe2a17db86a9bc3ab894210cb"
+  integrity sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw==
+
 xtend@~3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-3.0.0.tgz#5cce7407baf642cba7becda568111c493f59665a"