Fixme: the –server parameter is currently not respected, as it doesn't seem terribly easy to ask the load balancer for a particular connection by name.

Member BaseBlacklist::getTypeFromTitle (Title $title)

building a regex for this is pretty overkill

Class BitmapMetadataHandler

Other image formats.

Member BitmapMetadataHandler::Tiff ( $filename)

Add XMP support, so this function actually makes sense to put here.

Member Block::getTargetAndType ()

FIXME: This should be an integral part of the Block member variables

Member Block::selectFields ()

Deprecate this in favor of a method that returns tables and joins as well, and use CommentStore::getJoin().

Member CacheTime::isDifferentRevision ( $id)

We always return false if $this->getCacheRevisionId() is null; this prevents invalidating the whole parser cache when this change is deployed. Someday that should probably be changed.

Class Category

Move some stuff from CategoryPage.php to here, and use that.

Member CategoryFinder::seed ( $articleIds, $categories, $mode='AND')

FIXME: $categories/$mode

File cdb.php

document

Class ChangesListSpecialPage

Way too many public functions, most of them should be protected

Member ChangesListSpecialPage::getExtraOptions ( $opts)

This should handle options returned by getDefaultOptions().

Not called by anything in this class (but is in subclasses), should be called by something… doHeader() maybe?

Member ChangeTags::MAX_DELETE_USES

Use the job queue for tag deletion to avoid this restriction

Class ChangeTagsLogItem

Abstract out a base class for this and RevDelLogItem, similar to the RevisionItem class but specifically for log items.

Member Cite::DEFAULT_GROUP

document

Member Cite::MAX_STORAGE_LENGTH

Find a way to retrieve this information from the DBAL

Member Content::getTextForSearchIndex ()

Test that this actually works

Make sure this also works with LuceneSearch / WikiSearch

Member Content::getWikitextForTransclusion ()

Allow native handling, bypassing wikitext representation, like for includable special pages.

Allow transclusion into other content models than Wikitext!

Used in WikiPage and MessageCache to get message text. Not so nice. What should we use instead?!

Member ContentHandler::getAutoDeleteReason (Title $title, &$hasHistory)

&$hasHistory is extremely ugly, it's here because WikiPage::getAutoDeleteReason() and Article::generateReason() have it / want it.

Member ContentHandler::getFieldsForSearchIndex (SearchEngine $engine)

Expose title, redirect, namespace, text, source_text, text_bytes field mappings here. (see T142670 and T143409)

Member ContribsPager::formatRow ( $row)

This would probably look a lot nicer in a table.

Member Cookie::validateCookieDomain ( $domain, $originDomain=null)

fixme fails to detect 3-letter top-level domains

fixme fails to detect 2-letter top-level domains for single-domain use (probably not a big problem in practice, but there are test cases)

Member CoreTagHooks::gallery ( $content, $attributes, $parser)

break Parser::renderImageGallery out here too.

Member DatabaseInstaller::$parent

Naming this parent is confusing, 'installer' would be clearer.

Member DatabaseSqliteTest::testUpgrades ()

Currently only checks list of tables

Class DateFormatter

preferences, OutputPage

Member DBSiteStore::__construct (LoadBalancer $dbLoadBalancer)

: inject some kind of connection manager that is aware of the target wiki, instead of injecting a LoadBalancer.

Member DeletedContribsPager::formatRevisionRow ( $row)

This would probably look a lot nicer in a table.

Member DeletedContribsPager::formatRow ( $row)

This would probably look a lot nicer in a table.

File deleteOrphanedRevisions.php

More efficient cleanup of text records

Class Diff

document

Class DifferenceEngine

document

Member DifferenceEngine::generateTextDiffBody ( $otext, $ntext)

move this to TextDifferenceEngine, make DifferenceEngine abstract. At some point.

Class DifferenceEngineTest

tests for the rest of DifferenceEngine!

Class DiffFormatter

document

File dumpMessages.php

Make this more useful, right now just dumps $wgContLang

Member EditPage::internalAttemptSave (&$result, $bot=false)

FIXME: This interface is TERRIBLE, but hard to get rid of due to various error display idiosyncrasies. There are also lots of cases where error metadata is set in the object and retrieved later instead of being returned, e.g. AS_CONTENT_TOO_BIG and AS_BLOCKED_PAGE_FOR_USER. All that stuff needs to be cleaned up some time.

Member EnhancedChangesList::makeCacheGroupingKey (RCCacheEntry $cacheEntry)

use rc_source to group, if set; fallback to rc_type

Member EnhancedChangesListTest::testEndRecentChangesList ()

more tests for actual formatting, this is more of a smoke test

Member EnhancedChangesListTest::testRecentChangesLine ()

more tests

Class EraseArchivedFile

Maybe add some simple logging

Member Exif::__construct ( $file, $byteOrder='')

FIXME: The following are broke: SubjectArea. Need to test the more obscure tags. DigitalZoomRatio = 0/0 is rejected. need to determine if that's valid. Possibly should treat 0/0 = 0. need to read exif spec on that.

Member ExifBitmapHandler::getRotationForExif ( $data)

FIXME: Orientation can include flipping as well; see if this is an issue!

Class ExifRotationTest

covers tags

Member ExtensionProcessor::extractConfig1 (array $info)

In the future, this should be done via Config interfaces

Member ExtensionProcessor::extractConfig2 (array $info, $dir)

In the future, this should be done via Config interfaces

Class FormOptions

This badly needs some examples and tests :) The usage in SpecialRecentchanges class is a good ersatz in the meantime.

Class GadgetDefinitionValidator

maybe this should use a formal JSON schema validator or something

Member GIFHandler::getImageArea ( $image)

Add unit tests

Member HistoryPager::historyLine ( $row, $next, $notificationtimestamp=false, $latest=false, $firstInList=false)

document some more, and maybe clean up the code (some params redundant?)

Member Html::inlineScript ( $contents)

do some useful escaping as well, like if $contents contains literal "</script>" or (for XML) literal "]]>".

Class HTMLForm

Document 'section' / 'subsection' stuff

Member HTMLForm::displaySection ( $fields, $sectionName='', $fieldsetIDPrefix='', &$hasUserVisibleFields=false)

Document

Member HTMLForm::setMessagePrefix ( $p)

Currently only used for the "<fieldset>" legend on forms with multiple sections; should be used elsewhere?

Member HTMLForm::setSubmitID ( $t)

FIXME: Integrity of $t is not validated

File HtmlFormatter.php

: remove in 1.28

Class HTMLSelectAndOtherField

FIXME: If made 'required', only the text field should be compulsory.

Member Http::isValidURI ( $uri)

FIXME this is wildly inaccurate and fails to actually check most stuff

Class HttpErrorTest

tests for HttpError::report

Class HttpStatus

document

File IEContentAnalyzer.php

Define the exact license of this file.

Class IEUrlExtensionTest

tests below for findIE6Extension should be split into... ...a dataprovider and test method.

Member ImagePage::makeMetadataTable ( $metadata)

FIXME: Bad interface, see note on MediaHandler::formatMetadata().

Member IPTC::timeHelper ( $date, $time, $c)

Potentially this should also capture the timezone offset.

Class IPTest

Test methods in this call should be split into a method and a dataprovider.

Class JavaScriptContentHandler

Create a ScriptContentHandler base class, do highlighting stuff there?

Class JpegMetadataExtractorTest

Could use a test of extended XMP segments. Hard to find programs that create example files, and creating my own in vim propbably wouldn't serve as a very good "test". (Adobe photoshop probably creates such files but it costs money). The implementation of it currently in MediaWiki is based solely on reading the standard, without any real world test files.

Class JpegPixelFormatTest

covers tags

Member Language::convertHtml ( $text, $isTitle=false)

this should get integrated somewhere sane

Member Language::formatNum ( $number, $nocommafy=false)

check if it's viable to use localeconv() for the decimal separator thing.

Member Language::sprintfDate ( $format, $ts, DateTimeZone $zone=null, &$ttl='unused')

handling of "o" format character for Iranian, Hebrew, Hijri & Thai?

Member Language::translateBlockExpiry ( $str, User $user=null, $now=0)

Maybe translate block durations. Note that this function is somewhat misnamed: it deals with translating the duration ("1 week", "4 days", etc), not the expiry time (which is an absolute timestamp). Please note: do NOT add this blindly, as it is used on old expiry lengths recorded in log entries. You'd need to provide the start date to match up with it.

Member LanguageAr::normalize ( $s)

FIXME: This is language-specific for now only to avoid the negative performance impact of enabling it for all languages.

Member LanguageArTest::testFormatNum ()

split into a test and a dataprovider

Class LanguageCode

Move some of the code-related static methods out of Language into this class

Member LanguageMl::normalize ( $s)

FIXME: This is language-specific for now only to avoid the negative performance impact of enabling it for all languages.

Member LanguageNlTest::testFormatNum ()

split into a test and a dataprovider

File LanguageSrTest.php

methods in test class should be tidied:

Should be split into separate test methods and data providers
Tests for LanguageConverter and Language should probably be separate..

File LanguageUzTest.php

methods in test class should be tidied:

Should be split into separate test methods and data providers
Tests for LanguageConverter and Language should probably be separate..

Member LanguageYue::segmentByWord ( $string)

FIXME: Only do this for Han characters...

Member LanguageZh_hans::segmentByWord ( $string)

FIXME: Only do this for Han characters...

Class Linker

turn this into a legacy interface for HtmlPageLinkRenderer and similar services.

Member Linker::formatLinksInComment ( $comment, $title=null, $local=false, $wikiId=null)

FIXME: Doesn't handle sub-links as in image thumb texts like the main parser

Member Linker::makeMediaLinkFile (Title $title, $file, $html='')

Handle invalid or missing images better.

Class LinkFilter

implement the filter. Currently these are just some functions to help maintenance/cleanupSpam.php remove links to a single specified domain. The next thing is to implement functions for checking a given page against a big list of domains.

Member LinkSearchPage::getMaxResults ()

FIXME This special page should not use LIMIT for paging

Member LocalFile::selectFields ()

Deprecate this in favor of a method that returns tables and joins as well, and use CommentStore::getJoin().

Class LocalFileTest

Split tests into providers and test methods

Class LocalisationUpdate\GitHubFetcher

Could use file hashes to 1) avoid fetching files with same hash as the source. 2) avoid fetching files which haven't changed since last check if we store them.

Member LogPage::getTitleLink ( $type, $lang, $title, &$params)

Document

File MagicVariableTest.php

covers tags

File mcc.php

document

Member MediaHandler::formatMetadata ( $image, $context=false)

FIXME: This interface is not very flexible. The media handler should generate HTML instead. It can do all the formatting according to some standard. That makes it possible to do things like visual indication of grouped and chained streams in ogg container files.

Member MediaWiki\Linker\LinkRenderer::normalizeTarget (LinkTarget $target)

move the code from Linker actually here

Member MediaWiki\Session\PHPSessionHandler::returnSuccess ()

When we drop support for Zend PHP 5, this can be removed.

Member MediaWikiTitleCodec::splitTitleString ( $text, $defaultNamespace=NS_MAIN)

This method should be split up and an appropriate interface defined for use by the Title class.

this method is only exposed as a temporary measure to ease refactoring. It was copied with minimal changes from Title::secureAndSplit().

Member MergeHistory::merge (User $user, $reason='')

if all versions of page A are moved to B and then a user tries to do a reverse-merge via the "unmerge" log link, then page A will still be a redirect (as it was after the original merge), though it will have the old revisions back from before (as expected). The user may have to "undo" the redirect manually to finish the "unmerge". Maybe this should delete redirects at the source page of merges?

Class Message

test, can we have tests?
this documentation needs to be extended

Member Message::isBlank ()

FIXME: Merge with isDisabled()?

Class ModernTemplate

document

Member MovePage::moveToInternal (User $user, &$nt, $reason='', $createRedirect=true, array $changeTags=[])

This was basically directly moved from Title, it should be split into smaller functions

File mwdocgen.php

document

Member MWHttpRequest::setData ( $args)

overload the args param

Member MWLBFactory::getLBFactoryClass (array $config)

instead of this, use a ServiceContainer for managing the different implementations.

Class MWNamespaceTest

covers tags

FIXME: this test file is a mess

Member MWNamespaceTest::provideHasTalkNamespace ()

Implement testGetValidNamespaces().

Implement testGetCanonicalNamespaces().

Implement testGetCanonicalName().

Implement testGetCanonicalIndex().

Member MWNamespaceTest::testEquals ()

Implement testExists().

Member MWNamespaceTest::testIsCapitalizedWithWgCapitalLinkOverrides ()

split groups of assertions in autonomous testing functions MWNamespace::isCapitalized

Member MWNamespaceTest::testIsMovable ()

Write more texts, handle $wgAllowImageMoving setting MWNamespace::isMovable

File MWTerm.php

Fixme: Make this more generic

Class OldChangesListTest

add tests to cover article link, timestamp, character difference, log entry, user tool links, direction marks, tags, rollback, watching users, and date header.

Member OldLocalFile::selectFields ()

Deprecate this in favor of a method that returns tables and joins as well, and use CommentStore::getJoin().

Member Orphans::checkWidows ( $fix)

DON'T USE THIS YET! It will remove entries which have children, but which aren't properly attached (eg if page_latest is bogus but valid revisions do exist)

Class OutputPage

FIXME: Another class handles sending the whole page to the client.

document

Member OutputPage::$mScripts

We should split JS / CSS. mScripts content is inserted as is in "<head>" by Skin. This might contain either a link to a stylesheet or inline CSS.

Member OutputPage::disallowUserJs ()

this should be given a more accurate name

Class OutputPageTest

factor tests in this class into providers and test methods

Member PageArchive::listFiles ()

Does this belong in Image for fuller encapsulation?

Member Parser::setTransparentTagHook ( $tag, callable $callback)

better document or deprecate this

Class ParserCache

document

Class ParserIntegrationTest

covers tags

Member ParserOptions::$mUser

Track this for caching somehow without fragmenting the cache insanely

Member ParserOptions::$redirectTarget

Track this for caching somehow

Member ParserOutput::addTrackingCategory ( $msg, $title)

Migrate some code to TrackingCategories

File ParserTestRunner.php

Make this more independent of the configuration (and if possible the database)

Member ParserTestRunner::parseOptions ( $instring)

Move this to TestFileReader

Member ParserTestRunner::setupDatabase ( $nextTeardown=null)

: This is basically an unrefactored copy of MediaWikiTestCase::setupAllTestDBs. They should be factored out somehow.

Member ParserTestRunner::teardownDatabase ()

Move most things here to CloneDatabase

Member PostgresUpdater::getCoreUpdateList ()

FIXME: Postgres should use sequential updates like Mysql, Sqlite and everybody else. It never got refactored like it should've.

Class Preprocessor_Hash

: Consider replacing descriptor arrays with objects of a new class. Benchmark and measure resulting memory impact.

Class ProtectedPagesPager

document

Member PurgeChangedPages::pageableSortedRows (ResultWrapper $res, $column, $limit)

move this elsewhere

File rebuildrecentchanges.php

Document

File rebuildtextindex.php

document

Class RecentChange

Deprecate access to mAttribs (direct or via getAttributes). Right now we're having to include both rc_comment and rc_comment_text/rc_comment_data so random crap works right.

Member RecentChange::selectFields ()

Deprecate this in favor of a method that returns tables and joins as well, and use CommentStore::getJoin().

Class Revision

document

Member Revision::newFromArchiveRow ( $row, $overrides=[])

FIXME: Should be a subclass for RevisionDelete. [TS]

Member Revision::selectArchiveFields ()

Deprecate this in favor of a method that returns tables and joins as well, and use CommentStore::getJoin().

Member Revision::selectFields ()

Deprecate this in favor of a method that returns tables and joins as well, and use CommentStore::getJoin().

Member RevisionItem::getDiffLink ()

Essentially a copy of RevDelRevisionItem::getDiffLink. That class should inherit from this one, and implement an appropriate interface instead of extending RevDelItem

Member RevisionItem::getHTML ()

Essentially a copy of RevDelRevisionItem::getHTML. That class should inherit from this one, and implement an appropriate interface instead of extending RevDelItem

Member RevisionItem::getRevisionLink ()

Essentially a copy of RevDelRevisionItem::getRevisionLink. That class should inherit from this one, and implement an appropriate interface instead of extending RevDelItem

Member Sanitizer::escapeClass ( $class)

For extra validity, input should be validated UTF-8.

Member Sanitizer::escapeIdReferenceList ( $referenceString, $options=[])

wfDeprecated() uses of $options in 1.31, remove completely in 1.32

Member Sanitizer::mergeAttributes ( $a, $b)

implement merging for other attributes such as style

Member Sanitizer::validateAttributes ( $attribs, $whitelist)

Check for legal values where the DTD limits things.

Check for unique id attribute :P

Member Sanitizer::validateTagAttributes ( $attribs, $element)

Check for legal values where the DTD limits things.

Check for unique id attribute :P

Class SanitizerTest

Tests covering decodeCharReferences can be refactored into a single method and dataprovider.

Class SanitizerValidateEmailTest

all test methods in this class should be refactored and... use a single test method and a single data provider...

Member SearchEngine::getTextFromContent (Title $t, Content $c=null)

This isn't ideal, we'd really like to have content-specific handling here

Class SearchEngineDummy

FIXME: Dummy class should probably try something at least mildly useful, such as a LIKE search through titles.

Member SearchMssql::parseQuery ( $filteredText, $fulltext)

document

Class SearchResult

FIXME: This class is horribly factored. It would probably be better to have a useful base class to which you pass some standard information, then let the fancy self-highlighters extend that.

File Setup.php

UGLY UGLY

Member SideBarTest::assertSideBar ( $expected, $text, $message='')

this assert method to should be converted to a test using a dataprovider..

Class SiteConfiguration

Give examples for, suffixes: $conf->suffixes = [ 'wiki' ]; localVHosts callbacks!

Member Skin::setupSkinUserCss (OutputPage $out)

delete

Class SkinCologneBlue

document

File SkinCologneBlue.php

document

Class SkinModern

document

File SkinModern.php

document

Class SkinTemplate

Needs some serious refactoring into functions that correspond to the computations individual esi snippets need. Most importantly no body parsing for most of those of course.

Member SkinTemplate::makeArticleUrlDetails ( $name, $urlaction='')

is this even used?

Class SpecialAllPages

Rewrite using IndexPager

Member SpecialBlock::getSuggestedDurations ( $lang=null)

FIXME: This uses a rather odd syntax for the options, should it be converted to the standard "**<duration>|<displayname>" format?

Member SpecialBlock::getTargetAndType ( $par, WebRequest $request=null)

Should be in Block.php?

Member SpecialContributions::contributionsSub ( $userObj)

FIXME: Almost the same as getSubTitle in SpecialDeletedContributions.php. Could be combined.

Member SpecialMergeHistory::merge ()

if all versions of page A are moved to B and then a user tries to do a reverse-merge via the "unmerge" log link, then page A will still be a redirect (as it was after the original merge), though it will have the old revisions back from before (as expected). The user may have to "undo" the redirect manually to finish the "unmerge". Maybe this should delete redirects at the target page of merges?

Member SpecialPreferencesTest::testBug41337 ()

give this test a real name explaining what is being tested here

Member SpecialRevisionDelete::addUsageText ()

FIXME: Wikimedia-specific policy text

Member SpecialRevisionDelete::tryShowFile ( $archiveName)

Mostly copied from Special:Undelete. Refactor.

Member SpecialUpload::rotationEnabled ()

What about non-BitmapHandler handled files?

Member SpecialUploadStash::outputFileHeaders ( $contentType, $size)

Unsure about encoding as binary; if we received from HTTP perhaps we should use that encoding, concatenated with semicolon to $contentType as it usually is. Side effect: preps PHP to write headers to STDOUT.

File SpecialWhatlinkshere.php

Use some variant of Pager or something; the pagination here is lousy.

Class StripState

document, briefly.

Class TableDiffFormatter

document

Member Title::getBrokenLinksFrom ()

check if needed (used only in SpecialBrokenRedirects.php, and should use redirect table in this case).

Member Title::getUserPermissionsErrors ( $action, $user, $rigor='secure', $ignoreErrors=[])

FIXME: This does not check throttles (User::pingLimiter()).

Member Title::isCssJsSubpage ()

FIXME: Rename to isUserConfigPage()

Member Title::isCssOrJsPage ()

FIXME: Rename to isSiteConfigPage() and remove deprecated hook

Member Title::validateFileMoveOperation ( $nt)

move this to MovePage

Member TitleFormatter::getNamespaceName ( $namespace, $text)

Move this to a separate interface

Member TitlePermissionTest::testActionPermissions ()

This test method should be split up into separate test methods and data providers

Member TitlePermissionTest::testCssAndJavascriptPermissions ()

This test method should be split up into separate test methods and data providers

Member TitlePermissionTest::testPageRestrictions ()

This test method should be split up into separate test methods and data providers

Member TitlePermissionTest::testQuickPermissions ()

This test method should be split up into separate test methods and data providers

Member TitlePermissionTest::testSpecialsAndNSPermissions ()

This test method should be split up into separate test methods and data providers

Member TitleTest::testGetSubpageText ( $title, $expected, $msg='')

Handle $wgNamespacesWithSubpages cases provideSubpageTitleCases Title::getSubpageText

Member TransformationalImageHandler::getClientScalingThumbnailImage ( $image, $scalerParams)

FIXME: No rotation support

Member UIDGenerator::singleton ()

: move to MW-specific factory class and inject temp dir

Class UncategorizedImagesPage

FIXME: Use an instance of UncategorizedPagesPage or something

Class UncategorizedPagesPage

FIXME: Make $requestedNamespace selectable, unify all subclasses into one

Class UnregisteredLocalFile

Currently it doesn't really work in the repository role, there are lots of functions missing. It is used by the WebStore extension in the standalone role.

File update.php

document

Member UploadBase::checkSvgScriptCallback ( $element, $attribs, $data=null)

Replace this with a whitelist filter!

Member UploadStashTest::testBug29408 ()

give this test a real name explaining what is being tested here

Member User::passwordChangeInputAttribs ()

FIXME: This does not belong here; put it in Html or Linker or somewhere

Member User::saveSettings ()

Only rarely do all these fields need to be set!

Member wfAssembleUrl ( $urlParts)

Need to integrate this into wfExpandUrl (see T34168)

Member wfExpandIRI ( $url)

handle punycode domains too

Member wfExpandUrl ( $url, $defaultProto=PROTO_CURRENT)

this won't work with current-path-relative URLs like "subdir/foo.html", etc.

Member wfGetDB ( $db, $groups=[], $wiki=false)

Replace calls to wfGetDB with calls to LoadBalancer::getConnection() on an injected instance of LoadBalancer.

Member wfLogProfilingData ()

document

Member wfNegotiateType ( $cprefs, $sprefs)

FIXME: Doesn't handle params like 'text/plain; charset=UTF-8' XXX: generalize to negotiate other stuff

Member wfRemoveDotSegments ( $urlPath)

Need to integrate this into wfExpandUrl (see T34168)

Member wfShowingResults ( $offset, $limit)

document

Member WikiMap::getWikiName ( $wikiID)

We can give more info than just the wiki id!

Member Wikimedia\Http\HttpAcceptParser::parseWeights ( $rawHeader)

: If additional type parameters are present, ignore them cleanly. At present, they often confuse the result.

Member Wikimedia\Rdbms\DatabasePostgres::nativeInsertSelect ( $destTable, $srcTable, $varMap, $conds, $fname=__METHOD__, $insertOptions=[], $selectOptions=[], $selectJoinConds=[])

FIXME: Implement this a little better (seperate select/insert)?

Member Wikimedia\Rdbms\DatabaseSqlite::implicitGroupby ()

Check if it should be true like parent class

Member WikiPage::doRollback ( $fromP, $summary, $token, $bot, &$resultDetails, User $user, $tags=null)

Separate the business/permission stuff out from backend code

Remove $token parameter. Already verified by RollbackAction and ApiRollback.

Member WikiPage::getActionOverrides ()

Move this UI stuff somewhere else

Member WikiPage::supportsSections ()

The skin should check this and not offer section functionality if sections are not supported.

The EditPage should check this and not offer section functionality if sections are not supported.

Member WikiPageTest::broken_testDoRollback ()

FIXME: this is a better rollback test than the one below, but it keeps failing in jenkins for some reason.

Member WikiPageTest::testDoRollback ()

FIXME: the above rollback test is better, but it keeps failing in jenkins for some reason. WikiPage::doRollback

Member WikiReference::getLocalUrl ( $page, $fragmentId=null)

FIXME: This may be generalized...

Member WikiRevision::$isTemp

Unused?

Member WikitextContentHandlerTest::testDataIndexFieldsFile ()

Text case requires database, should be done by a test class in the Database group

Member Xml::isWellFormed ( $text)

Error position reporting return

Member XMPReader::parseExtended ( $content)

In serious need of testing

Member XMPTest::testExtendedXMP ()

This is based on what the standard says. Need to find a real world example file to double check the support for this is right.