Move the deployment section from README.development to the man page.

[dead/htsn-import.git] / doc / man1 / htsn-import.1

.TH htsn-import 1

.SH NAME
htsn-import \- Import XML files from The Sports Network into an RDBMS.

.SH SYNOPSIS

\fBhtsn-import\fR [OPTIONS] [FILES]

.SH DESCRIPTION
.P
The Sports Network <http://www.sportsnetwork.com/> offers an XML feed
containing various sports news and statistics. Our sister program
\fBhtsn\fR is capable of retrieving the feed and saving the individual
XML documents contained therein. But what to do with them?
.P
The purpose of \fBhtsn-import\fR is to take these XML documents and
get them into something we can use, a relational database management
system (RDBMS), otherwise known as a SQL database. The structure of
relational database, is, well, relational, and the feed XML is not. So
there is some work to do before the data can be imported into the
database.
.P
First, we must parse the XML. Each supported document type (see below)
has a full pickle/unpickle implementation (\(dqpickle\(dq is simply a
synonym for \(dqserialize\(dq here). That means that we parse the
entire document into a data structure, and if we pickle (serialize)
that data structure, we get the exact same XML document tha we started
with.
.P
This is important for two reasons. First, it serves as a second level
of validation. The first validation is performed by the XML parser,
but if that succeeds and unpicking fails, we know that something is
fishy. Second, we don't ever want to be surprised by some new element
or attribute showing up in the XML. The fact that we can unpickle the
whole thing now means that we won't be surprised in the future.
.P
The aforementioned feature is especially important because we
automatically migrate the database schema every time we import a
document. If you attempt to import a \(dqnewsxml.dtd\(dq document, all
database objects relating to the news will be created if they do not
exist. We don't want the schema to change out from under us without
warning, so it's important that no XML be parsed that would result in
a different schema than we had previously. Since we can
pickle/unpickle everything already, this should be impossible.
.P
A list of supported document types is given in the appendix.
.P
The GameInfo and SportInfo types do not have their own top-level
tables in the database. Instead, their raw XML is stored in either the
\(dqgame_info\(dq or \(dqsport_info\(dq table respectively.

.SH DATABASE SCHEMA
.P
At the top level (with two notable exceptions), we have one table for
each of the XML document types that we import. For example, the
documents corresponding to \fInewsxml.dtd\fR will have a table called
\(dqnews\(dq. All top-level tables contain two important fields,
\(dqxml_file_id\(dq and \(dqtime_stamp\(dq. The former is unique and
prevents us from inserting the same data twice. The time stamp on the
other hand lets us know when the data is old and can be removed. The
database schema make it possible to delete only the outdated top-level
records; all transient children should be removed by triggers.
.P
These top-level tables will often have children. For example, each
news item has zero or more locations associated with it. The child
table will be named <parent>_<children>, which in this case
corresponds to \(dqnews_locations\(dq.
.P
To relate the two, a third table may exist with name
<parent>__<child>. Note the two underscores. This prevents ambiguity
when the child table itself contains underscores. The table joining
\(dqnews\(dq with \(dqnews_locations\(dq is thus called
\(dqnews__news_locations\(dq. This is necessary when the child table
has a unique constraint; we don't want to blindly insert duplicate
records keyed to the parent. Instead we'd like to use the third table
to map an existing child to the new parent.
.P
Where it makes sense, children are kept unique to prevent pointless
duplication. This slows down inserts, and speeds up reads (which are
much more frequent). There is a tradeoff to be made, however. For a
table with a small, fixed upper bound on the number of rows (like
\(dqodds_casinos\(dq), there is great benefit to de-duplication. The
total number of rows stays small, so inserts are still quick, and many
duplicate rows are eliminated.
.P
But, with a table like \(dqodds_games\(dq, the number of games grows
quickly and without bound. It is therefore more beneficial to be able
to delete the old games (through an ON DELETE CASCADE, tied to
\(dqodds\(dq) than it is to eliminate duplication. A table like
\(dqnews_locations\(dq is somewhere in-between. It is hoped that the
unique constraint in the top-level table's \(dqxml_file_id\(dq will
prevent duplication in this case anyway.
.P
The aforementioned exceptions are the \(dqgame_info\(dq and
\(dqsport_info\(dq tables. These tables contain the raw XML for a
number of DTDs that are not handled individually. This is partially
for backwards-compatibility with a legacy implementation, but is
mostly a stopgap due to a lack of resources at the moment. These two
tables (game_info and sport_info) still possess timestamps that allow
us to prune old data.
.P
UML diagrams of the resulting database schema for each XML document
type are provided with the \fBhtsn-import\fR documentation, in the
\fIdoc/dbschema\fR directory. These are not authoritative, but it
should be considered a bug if they are incorrect. The diagrams are
created using the pgModeler <http://www.pgmodeler.com.br/> tool.

.SH NULL POLICY
.P
Normally in a database one makes a distinction between fields that
simply don't exist, and those fields that are
\(dqempty\(dq. Translating from XML, there is a natural way to
determine which one should be used: if an element is present in the
XML document but its contents are empty, then an empty string should
be inserted into the corresponding field. If on the other hand the
element is missing entirely, the corresponding database entry should
be NULL to indicate that fact.
.P
This sounds well and good, but the XML must be consistent for the
database consumer to make any sense of what he sees. The feed XML uses
optional and blank elements interchangeably, and without any
discernable pattern. To propagate this pattern into the database would
only cause confusion.
.P
As a result, a policy was adopted: both optional elements and elements
whose contents can be empty will be considered nullable in the
database. If the element is missing, the corresponding field is
NULL. Likewise if the content is simply missing. That means there
should never be a (completely) empty string in a database column.

.SH XML SCHEMA GENERATION
.P
In order to parse XML, you need to know the structure of your
documents. Usually this is given in the form of a DTD or schema. The
Sports Network does provide DTDs for their XML, but unfortunately many
of them do not match the XML found on the feed.
.P
We need to construct a database into which to insert the XML. How do
we know if <game> should be a column, or if it should have its own
table? We need to know how many times it can appear in the
document. So we need some form of specification. Since the supplied
DTDs are incorrect, we would like to generate them automatically.
.P
The process should go something like,
.IP 1.
Generate a DTD from the first foo.xml file we see. Call it foo.dtd.
.IP 2.
Validate future foo documents against foo.dtd. If they all validate,
great. If one fails, add it to the corpus and update foo.dtd so
that both the original and the new foo.xml validate.
.IP 3.
Repeat until no more failures occur. This can never be perfect:
tomorrow we could get a foo.xml that's wildly different from what
we've seen in the past. But it's the best we can hope for under
the circumstances.
.P
Enter XML-Schema-learner
<https://github.com/kore/XML-Schema-learner>. This tool can infer a
DTD from a set of sample XML files. The top-level \(dqschemagen\(dq
folder (in this project) contains a number of subfolders\(emone for
each type of document that we want to parse. Contained therein are XML
samples for that particular document type. These were hand-picked one
at a time according to the procedure above, and the complete set of
XML is what we use to generate the DTDs used by htsn-import.
.P
To generate them, run `make schema` at the project
root. XML-Schema-learner will be invoked on each subfolder of
\(dqschemagen\(dq and will output the corresponding DTDs to the
\(dqschemagen\(dq folder.
.P
Most of the production schemas are generated this way; however, a few
needed manual tweaking. The final, believed-to-be-correct schemas for
all supported document types can be found in the \(dqschema\(dq folder in
the project root. Having the correct DTDs available means you
don't need XML-Schema-learner available to install \fBhtsn-import\fR.

.SH XML SCHEMA UPDATES
.P
If a new tag is added to an XML document type, \fBhtsn-import\fR will
most likely refuse to parse it, since the new documents no longer
match the existing DTD.
.P
The first thing to do in that case is add the unparseable document to
the \(dqschemagen\(dq directory, and generate a new DTD that matches
both the old and new samples. Once a new, correct DTD has been
generated, it should be added to the \(dqschema\(dq directory. Then,
the parser can be updated and \fBhtsn-import\fR rebuilt.
.P
At this point, \fBhtsn-import\fR should be capable of importing the
new document. But the addition of the new tag will most require new
fields in the database. Fortunately, easy migrations like this are
handled automatically. As an example, at one point, \fIOdds_XML.dtd\fR
did not contain the \(dqHStarter\(dq and \(dqAStarter\(dq elements
associated with its games. Suppose we parse one of the old documents
(without \(dqHStarter\(dq and \(dqAStarter\(dq) using an old version
of \fBhtsn-import\fR:
.P
.nf
.I $ htsn-import --connection-string='foo.sqlite3' \\\\
.I "              schemagen/Odds_XML/19996433.xml"
Migration: CREATE TABLE \(dqodds\(dq ...
Successfully imported schemagen/Odds_XML/19996433.xml.
Processed 1 document(s) total.
.fi
.P
At this point, the database schema matches the old documents, i.e. the
ones without \fIAStarter\fR and \fIHStarter\fR. If we use a new
version of \fBhtsn-import\fR, supporting the new fields, the migration
is handled gracefully:
.P
.nf
.I $ htsn-import --connection-string='foo.sqlite3' \\\\
.I "              schemagen/Odds_XML/21315768.xml"
Migration: ALTER TABLE \(dqodds_games\(dq
           ADD COLUMN \(dqaway_team_starter_id\(dq INTEGER;
Migration: ALTER TABLE \(dqodds_games\(dq
           ADD COLUMN \(dqaway_team_starter_name\(dq VARCHAR;
Migration: ALTER TABLE \(dqodds_games\(dq
           ADD COLUMN \(dqhome_team_starter_id\(dq INTEGER;
Migration: ALTER TABLE \(dqodds_games\(dq
           ADD COLUMN \(dqhome_team_starter_name\(dq VARCHAR;
Successfully imported schemagen/Odds_XML/21315768.xml.
Processed 1 document(s) total.
.fi
.P
If fields are removed from the schema, then manual intervention may be
necessary:
.P
.nf
.I $ htsn-import -b Postgres -c 'dbname=htsn user=postgres' \\\\
.I "              schemagen/Odds_XML/19996433.xml"
ERROR: Database migration: manual intervention required.
The following actions are considered unsafe:
ALTER TABLE \(dqodds_games\(dq DROP COLUMN \(dqaway_team_starter_id\(dq
ALTER TABLE \(dqodds_games\(dq DROP COLUMN \(dqaway_team_starter_name\(dq
ALTER TABLE \(dqodds_games\(dq DROP COLUMN \(dqhome_team_starter_id\(dq
ALTER TABLE \(dqodds_games\(dq DROP COLUMN \(dqhome_team_starter_name\(dq

ERROR: Failed to import file schemagen/Odds_XML/19996433.xml.
Processed 0 document(s) total.
.fi
.P
To fix these errors, manually invoke the SQL commands that were
considered unsafe:
.P
.nf
.I $ psql -U postgres -d htsn \\\\
.I "       -c 'ALTER TABLE odds_games DROP COLUMN away_team_starter_id;'"
ALTER TABLE
.I $ psql -U postgres -d htsn \\\\
.I "       -c 'ALTER TABLE odds_games DROP COLUMN away_team_starter_name;'"
ALTER TABLE
.I $ psql -U postgres -d htsn \\\\
.I "       -c 'ALTER TABLE odds_games DROP COLUMN home_team_starter_id;'"
ALTER TABLE
.I $ psql -U postgres -d htsn \\\\
.I "       -c 'ALTER TABLE odds_games DROP COLUMN home_team_starter_name;'"
ALTER TABLE
.fi
.P
After manually adjusting the schema, the import should succeed.

.SH XML SCHEMA ODDITIES
.P
There are a number of problems with the XML on the wire. Even if we
construct the DTDs ourselves, the results are sometimes
inconsistent. Here we document a few of them.

.IP \[bu] 2
\fIOdds_XML.dtd\fR

The <Notes> elements here are supposed to be associated with a set of
<Game> elements, but since the pair
(<Notes>...</Notes><Game>...</Game>) can appear zero or more times,
this leads to ambiguity in parsing. We therefore ignore the notes
entirely (although a hack is employed to facilitate parsing). The same
thing goes for the newer <League_Name> element.

.IP \[bu]
\fIweatherxml.dtd\fR

There appear to be two types of weather documents; the first has
<listing> contained within <forecast> and the second has <forecast>
contained within <listing>. While it would be possible to parse both,
it would greatly complicate things. The first form is more common, so
that's all we support for now. An example is provided as
schemagen/weatherxml/20143655.xml.

.SH DEPLOYMENT
.P
When deploying for the first time, the target database will most
likely be empty. The schema will be migrated when a new document type
is seen, but this has a downside: it can be months before every
supported document type has been seen once. This can make it difficult
to test the database permissions.
.P
Since all of the test XML documents have old timestamps, one easy
workaround is the following: simply import all of the test XML
documents, and then delete them using whatever script is used to prune
old entries. This will force the migration of the schema, after which
you can set and test the database permissions.
.P
Something as simple as,
.P
.nf
.I $ find ./test/xml -iname '*.xml' | xargs htsn-import -c foo.sqlite
.fi
.P
should do it.

.SH OPTIONS

.IP \fB\-\-backend\fR,\ \fB\-b\fR
The RDBMS backend to use. Valid choices are \fISqlite\fR and
\fIPostgres\fR. Capitalization is important, sorry.

Default: Sqlite

.IP \fB\-\-connection-string\fR,\ \fB\-c\fR
The connection string used for connecting to the database backend
given by the \fB\-\-backend\fR option. The default is appropriate for
the \fISqlite\fR backend.

Default: \(dq:memory:\(dq

.IP \fB\-\-log-file\fR
If you specify a file here, logs will be written to it (possibly in
addition to syslog). Can be either a relative or absolute path. It
will not be auto-rotated; use something like logrotate for that.

Default: none

.IP \fB\-\-log-level\fR
How verbose should the logs be? We log notifications at four levels:
DEBUG, INFO, WARN, and ERROR. Specify the \(dqmost boring\(dq level of
notifications you would like to receive (in all-caps); more
interesting notifications will be logged as well. The debug output is
extremely verbose and will not be written to syslog even if you try.

Default: INFO

.IP \fB\-\-remove\fR,\ \fB\-r\fR
Remove successfully processed files. If you enable this, you can see
at a glance which XML files are not being processed, because they're
all that should be left.

Default: disabled

.IP \fB\-\-syslog\fR,\ \fB\-s\fR
Enable logging to syslog. On Windows this will attempt to communicate
(over UDP) with a syslog daemon on localhost, which will most likely
not work.

Default: disabled

.SH CONFIGURATION FILE
.P
Any of the command-line options mentioned above can be specified in a
configuration file instead. We first look for \(dqhtsn-importrc\(dq in
the system configuration directory. We then look for a file named
\(dq.htsn-importrc\(dq in the user's home directory. The latter will
override the former.
.P
The user's home directory is simply $HOME on Unix; on Windows it's
wherever %APPDATA% points. The system configuration directory is
determined by Cabal; the \(dqsysconfdir\(dq parameter during the
\(dqconfigure\(dq step is used.
.P
The file's syntax is given by examples in the htsn-importrc.example file
(included with \fBhtsn-import\fR).
.P
Options specified on the command-line override those in either
configuration file.

.SH EXAMPLES
.IP \[bu] 2
Import newsxml.xml into a preexisting sqlite database named \(dqfoo.sqlite3\(dq:

.nf
.I $ htsn-import --connection-string='foo.sqlite3' \\\\
.I "              test/xml/newsxml.xml"
Successfully imported test/xml/newsxml.xml.
Imported 1 document(s) total.
.fi
.IP \[bu]
Repeat the previous example, but delete newsxml.xml afterwards:

.nf
.I $ htsn-import --connection-string='foo.sqlite3' \\\\
.I "              --remove test/xml/newsxml.xml"
Successfully imported test/xml/newsxml.xml.
Imported 1 document(s) total.
Removed processed file test/xml/newsxml.xml.
.fi
.IP \[bu]
Use a Postgres database instead of the default Sqlite. This assumes
that you have a database named \(dqhtsn\(dq accessible to user
\(dqpostgres\(dq locally:

.nf
.I $ htsn-import --connection-string='dbname=htsn user=postgres' \\\\
.I "              --backend=Postgres test/xml/newsxml.xml"
Successfully imported test/xml/newsxml.xml.
Imported 1 document(s) total.
.fi

.SH BUGS

.P
Send bugs to michael@orlitzky.com.

.SH APPENDIX: SUPPORTED DOCUMENT TYPES
.P
The XML document types obtained from the feed are uniquely identified
by their DTDs. We currently support documents with the following DTDs:
.IP \[bu] 2
AutoRacingResultsXML.dtd
.IP \[bu]
Auto_Racing_Schedule_XML.dtd
.IP \[bu]
Heartbeat.dtd
.IP \[bu]
Injuries_Detail_XML.dtd
.IP \[bu]
injuriesxml.dtd
.IP \[bu]
jfilexml.dtd
.IP \[bu]
newsxml.dtd
.IP \[bu]
Odds_XML.dtd
.IP \[bu]
Schedule_Changes_XML.dtd
.IP \[bu]
scoresxml.dtd
.IP \[bu]
weatherxml.dtd
.IP \[bu]
GameInfo
.RS
.IP \[bu] 2
CBASK_Lineup_XML.dtd
.IP \[bu]
cbaskpreviewxml.dtd
.IP \[bu]
cflpreviewxml.dtd
.IP \[bu]
Matchup_NBA_NHL_XML.dtd
.IP \[bu]
MLB_Fielding_XML.dtd
.IP \[bu]
MLB_Gaming_Matchup_XML.dtd
.IP \[bu]
MLB_Lineup_XML.dtd
.IP \[bu]
MLB_Matchup_XML.dtd
.IP \[bu]
MLS_Preview_XML.dtd
.IP \[bu]
mlbpreviewxml.dtd
.IP \[bu]
NBA_Gaming_Matchup_XML.dtd
.IP \[bu]
NBA_Playoff_Matchup_XML.dtd
.IP \[bu]
NBALineupXML.dtd
.IP \[bu]
nbapreviewxml.dtd
.IP \[bu]
NCAA_FB_Preview_XML.dtd
.IP \[bu]
NFL_NCAA_FB_Matchup_XML.dtd
.IP \[bu]
nflpreviewxml.dtd
.IP \[bu]
nhlpreviewxml.dtd
.IP \[bu]
recapxml.dtd
.IP \[bu]
WorldBaseballPreviewXML.dtd
.RE
.IP \[bu]
SportInfo
.RS
.IP \[bu] 2
CBASK_3PPctXML.dtd
.IP \[bu]
Cbask_All_Tourn_Teams_XML.dtd
.IP \[bu]
CBASK_AssistsXML.dtd
.IP \[bu]
Cbask_Awards_XML.dtd
.IP \[bu]
CBASK_BlocksXML.dtd
.IP \[bu]
Cbask_Conf_Standings_XML.dtd
.IP \[bu]
Cbask_DivII_III_Indv_Stats_XML.dtd
.IP \[bu]
Cbask_DivII_Team_Stats_XML.dtd
.IP \[bu]
Cbask_DivIII_Team_Stats_XML.dtd
.IP \[bu]
CBASK_FGPctXML.dtd
.IP \[bu]
CBASK_FoulsXML.dtd
.IP \[bu]
CBASK_FTPctXML.dtd
.IP \[bu]
Cbask_Indv_Scoring_XML.dtd
.IP \[bu]
CBASK_MinutesXML.dtd
.IP \[bu]
Cbask_Polls_XML.dtd
.IP \[bu]
CBASK_ReboundsXML.dtd
.IP \[bu]
CBASK_ScoringLeadersXML.dtd
.IP \[bu]
Cbask_Team_ThreePT_Made_XML.dtd
.IP \[bu]
Cbask_Team_ThreePT_PCT_XML.dtd
.IP \[bu]
Cbask_Team_Win_Pct_XML.dtd
.IP \[bu]
Cbask_Top_Twenty_Five_XML.dtd
.IP \[bu]
CBASK_TopTwentyFiveResult_XML.dtd
.IP \[bu]
Cbask_Tourn_Awards_XML.dtd
.IP \[bu]
Cbask_Tourn_Champs_XML.dtd
.IP \[bu]
Cbask_Tourn_Indiv_XML.dtd
.IP \[bu]
Cbask_Tourn_Leaders_XML.dtd
.IP \[bu]
Cbask_Tourn_MVP_XML.dtd
.IP \[bu]
Cbask_Tourn_Records_XML.dtd
.IP \[bu]
LeagueScheduleXML.dtd
.IP \[bu]
minorscoresxml.dtd
.IP \[bu]
Minor_Baseball_League_Leaders_XML.dtd
.IP \[bu]
Minor_Baseball_Standings_XML.dtd
.IP \[bu]
Minor_Baseball_Transactions_XML.dtd
.IP \[bu]
mlbbattingavgxml.dtd
.IP \[bu]
mlbdoublesleadersxml.dtd
.IP \[bu]
MLBGamesPlayedXML.dtd
.IP \[bu]
MLBGIDPXML.dtd
.IP \[bu]
MLBHitByPitchXML.dtd
.IP \[bu]
mlbhitsleadersxml.dtd
.IP \[bu]
mlbhomerunsxml.dtd
.IP \[bu]
MLBHRFreqXML.dtd
.IP \[bu]
MLBIntWalksXML.dtd
.IP \[bu]
MLBKORateXML.dtd
.IP \[bu]
mlbonbasepctxml.dtd
.IP \[bu]
MLBOPSXML.dtd
.IP \[bu]
MLBPlateAppsXML.dtd
.IP \[bu]
mlbrbisxml.dtd
.IP \[bu]
mlbrunsleadersxml.dtd
.IP \[bu]
MLBSacFliesXML.dtd
.IP \[bu]
MLBSacrificesXML.dtd
.IP \[bu]
MLBSBSuccessXML.dtd
.IP \[bu]
mlbsluggingpctxml.dtd
.IP \[bu]
mlbstandxml.dtd
.IP \[bu]
mlbstandxml_preseason.dtd
.IP \[bu]
mlbstolenbasexml.dtd
.IP \[bu]
mlbtotalbasesleadersxml.dtd
.IP \[bu]
mlbtriplesleadersxml.dtd
.IP \[bu]
MLBWalkRateXML.dtd
.IP \[bu]
mlbwalksleadersxml.dtd
.IP \[bu]
MLBXtraBaseHitsXML.dtd
.IP \[bu]
MLB_Pitching_Appearances_Leaders.dtd
.IP \[bu]
MLB_ERA_Leaders.dtd
.IP \[bu]
MLB_Pitching_Balks_Leaders.dtd
.IP \[bu]
MLB_Pitching_CG_Leaders.dtd
.IP \[bu]
MLB_Pitching_ER_Allowed_Leaders.dtd
.IP \[bu]
MLB_Pitching_Hits_Allowed_Leaders.dtd
.IP \[bu]
MLB_Pitching_Hit_Batters_Leaders.dtd
.IP \[bu]
MLB_Pitching_HR_Allowed_Leaders.dtd
.IP \[bu]
MLB_Pitching_IP_Leaders.dtd
.IP \[bu]
MLB_Pitching_Runs_Allowed_Leaders.dtd
.IP \[bu]
MLB_Pitching_Saves_Leaders.dtd
.IP \[bu]
MLB_Pitching_Shut_Outs_Leaders.dtd
.IP \[bu]
MLB_Pitching_Starts_Leaders.dtd
.IP \[bu]
MLB_Pitching_Strike_Outs_Leaders.dtd
.IP \[bu]
MLB_Pitching_Walks_Leaders.dtd
.IP \[bu]
MLB_Pitching_WHIP_Leaders.dtd
.IP \[bu]
MLB_Pitching_Wild_Pitches_Leaders.dtd
.IP \[bu]
MLB_Pitching_Win_Percentage_Leaders.dtd
.IP \[bu]
MLB_Pitching_WL_Leaders.dtd
.IP \[bu]
NBA_Team_Stats_XML.dtd
.IP \[bu]
NBA3PPctXML.dtd
.IP \[bu]
NBAAssistsXML.dtd
.IP \[bu]
NBABlocksXML.dtd
.IP \[bu]
nbaconfrecxml.dtd
.IP \[bu]
nbadaysxml.dtd
.IP \[bu]
nbadivisionsxml.dtd
.IP \[bu]
NBAFGPctXML.dtd
.IP \[bu]
NBAFoulsXML.dtd
.IP \[bu]
NBAFTPctXML.dtd
.IP \[bu]
NBAMinutesXML.dtd
.IP \[bu]
NBAReboundsXML.dtd
.IP \[bu]
NBAScorersXML.dtd
.IP \[bu]
nbastandxml.dtd
.IP \[bu]
NBAStealsXML.dtd
.IP \[bu]
nbateamleadersxml.dtd
.IP \[bu]
nbatripledoublexml.dtd
.IP \[bu]
NBATurnoversXML.dtd
.IP \[bu]
NCAA_Conference_Schedule_XML.dtd
.IP \[bu]
nflfirstdownxml.dtd
.IP \[bu]
NFLFumbleLeaderXML.dtd
.IP \[bu]
NFLGiveTakeXML.dtd
.IP \[bu]
NFLInside20XML.dtd
.IP \[bu]
NFLKickoffsXML.dtd
.IP \[bu]
NFLMondayNightXML.dtd
.IP \[bu]
NFLPassLeadXML.dtd
.IP \[bu]
NFLQBStartsXML.dtd
.IP \[bu]
NFLSackLeadersXML.dtd
.IP \[bu]
nflstandxml.dtd
.IP \[bu]
NFLTeamRankingsXML.dtd
.IP \[bu]
NFLTopPerformanceXML.dtd
.IP \[bu]
NFLTotalYardageXML.dtd
.IP \[bu]
NFL_KickingLeaders_XML.dtd
.IP \[bu]
NFL_NBA_Draft_XML.dtd
.IP \[bu]
NFL_Roster_XML.dtd
.IP \[bu]
NFL_Team_Stats_XML.dtd
.IP \[bu]
Transactions_XML.dtd
.IP \[bu]
Weekly_Sched_XML.dtd
.IP \[bu]
WNBA_Team_Leaders_XML.dtd
.IP \[bu]
WNBA3PPctXML.dtd
.IP \[bu]
WNBAAssistsXML.dtd
.IP \[bu]
WNBABlocksXML.dtd
.IP \[bu]
WNBAFGPctXML.dtd
.IP \[bu]
WNBAFoulsXML.dtd
.IP \[bu]
WNBAFTPctXML.dtd
.IP \[bu]
WNBAMinutesXML.dtd
.IP \[bu]
WNBAReboundsXML.dtd
.IP \[bu]
WNBAScorersXML.dtd
.IP \[bu]
wnbastandxml.dtd
.IP \[bu]
WNBAStealsXML.dtd
.IP \[bu]
WNBATurnoversXML.dtd
.RE