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### B.22.1 Usage

The usage of `taplint` is

       stilts <stilts-flags> taplint stages=[+/-]XXX ... maxtable=<int-value>
                                     format=text|json report=[EWISF]+
                                     maxrepeat=<int-value> truncate=<int-value>
                                     debug=true|false interface=tap1.0|tap1.1|cap
                                     syncurl=<url-value> asyncurl=<url-value>
                                     tablesurl=<url-value>
                                     capabilitiesurl=<url-value>
                                     availabilityurl=<url-value>
                                     examplesurl=<url-value>
                                     [tapurl=]<url-value>

If you don't have the `stilts` script installed, write "`java -jar stilts.jar`" instead of "`stilts`" - see Section 3. The available `<stilts-flags>` are listed in Section 2.1. For programmatic invocation, the Task class for this command is `uk.ac.starlink.ttools.task.TapLint`.

Parameter values are assigned on the command line as explained in Section 2.3. They are as follows:

`asyncurl = <url-value>` (URL)
  Sets the URL to use for the async endpoint of the TAP service. The default value would be `<tapurl>/async`, but it may be influenced by the chosen `interface` value, and it can be further overridden by setting this value.
`availabilityurl = <url-value>` (URL)
  Sets the URL to use for the availability endpoint of the TAP service. The default value would be `<tapurl>/availability`, but it may be influenced by the chosen `interface` value, and it can be further overridden by setting this value.
`capabilitiesurl = <url-value>` (URL)
  Sets the URL to use for the capabilities endpoint of the TAP service. The default value would be `<tapurl>/capabilities`, but it may be influenced by the chosen `interface` value, and it can be further overridden by setting this value.
`debug = true|false` (Boolean)
  If true, debugging output including stack traces will be output along with the normal validation messages.

  [Default: `false`]

`examplesurl = <url-value>` (URL)
  Sets the URL to use for the examples endpoint of the TAP service. The default value would be `<tapurl>/examples`, but it may be influenced by the chosen `interface` value, and it can be further overridden by setting this value.
`format = text|json` (OutputReporter)
  Determines the format of the output. Possible values are `text`, `json`.

  Note not all of the other parameters may be applicable to all output formats.

  [Default: `text`]

`interface = tap1.0|tap1.1|cap` (String)
  Defines how the service endpoints and the version of the TAP protocol to use for queries is determined. This may take one of the following (case-insensitive) values:
  - `TAP1.0`: The standard TAP endpoints are used, without examining the service's capabilities document. The service is queried using version 1.0 of the TAP protocol.
  - `TAP1.1`: The standard TAP endpoints are used, without examining the service's capabilities document. The service is queried using version 1.1 of the TAP protocol.
  - `cap`: The service's capabilities document is examined, and the endpoints listed there are used.

  The capabilities document, if used, is read from `tapurl`/capabilities unless the `capabilitiesurl` parameter is defined, in which case that is used.

  The baseline value of all the TAP service endpoints (`sync`, `async`, `tables`, `capabilities`, `examples`) are determined by this parameter, but each of those endpoint values may be overridden individually by other endpoint-specific parameters (`syncurl`, `asyncurl`, `tablesurl`, `capabilitiesurl`, `availabilityurl`, `examplesurl`)

  For default (unauthenticated) access, the default value is usually suitable.

  [Default: `cap`]

`maxrepeat = <int-value>` (Integer)
  Puts a limit on the number of times that a single message will be repeated. By setting this to some reasonably small number, you can ensure that the output does not get cluttered up by millions of repetitions of essentially the same error.

  [Default: `9`]

`maxtable = <int-value>` (Integer)
  Limits the number of tables from the service that will be tested. Currently, this only affects stage `MDQ`. If the value is left blank (the default), or if it is larger than the number of tables actually present in the service, it will have no effect.
`report = [EWISF]+` (String)
  Letters indicating which message types should be listed. Each character of the string is one of the letters `E`, `W`, `I`, `S`, `F` with the following meanings:
  - `E`: Error in operation or standard compliance of the service.
  - `W`: Warning that service behaviour is questionable, or contravenes a standard recommendation, but is not in actual violation of the standard.
  - `I`: Information about progress, for instance details of queries made.
  - `S`: Summary of previous successful/unsuccessful reports.
  - `F`: Failure of the validator to perform some testing. The cause is either some error internal to the validator, or some error or missing functionality in the service which has already been reported.

  [Default: `EWISF`]

`stages = [+/-]XXX ...` (String[])
  Determines the validation stages which the validator will peform. Each stage is represented by a short code, as follows:
  - `TMV`: Validate table metadata against XML schema
  - `TME`: Check content of tables metadata from /tables
  - `TMS`: Check content of tables metadata from TAP_SCHEMA
  - `TMC`: Compare table metadata from /tables and TAP_SCHEMA
  - `UUC`: Check column units and UCDs are legal
  - `CPV`: Validate capabilities against XML schema
  - `CAP`: Check TAP and TAPRegExt content of capabilities document
  - `AVV`: Validate availability against XML schema
  - `QGE`: Make ADQL queries in sync GET mode
  - `QPO`: Make ADQL queries in sync POST mode
  - `QAS`: Make ADQL queries in async mode
  - `UWS`: Test asynchronous UWS/TAP behaviour
  - `MDQ`: Check table query result columns against declared metadata
  - `OBS`: Test implementation of ObsCore Data Model
  - `LOC`: Test implementation of ObsLocTAP Data Model
  - `EPN`: Test implementation of EPN-TAP tables (off)
  - `UPL`: Make queries with table uploads
  - `EXA`: Check content of examples document

  This parameter can specify what stages to run in the following ways:

  - if left blank, the default list of stages (which is most or all of them) will be run
  - if the value is a space-separated list of three-letter codes, it lists the stages that will be run
  - if the value is a space separated list of three-letter codes preceded by a "+" or "-" character, the named stages will be removed or added to the default list
  So "`TME CAP`" will run only Table Metadata and Capability stages, while "`-EXA -UPL`" will run all the default stages apart from Examples and Upload. The order in which stages are listed is not significant.

  Note that removing some stages may affect the operation of others; for instance table metadata is acquired from the metadata stages, and avoiding those will mean that later stages which use the table metadata to pose queries will not be able to do so with knowledge of the database schema.

`syncurl = <url-value>` (URL)
  Sets the URL to use for the sync endpoint of the TAP service. The default value would be `<tapurl>/sync`, but it may be influenced by the chosen `interface` value, and it can be further overridden by setting this value.
`tablesurl = <url-value>` (URL)
  Sets the URL to use for the tables endpoint of the TAP service. The default value would be `<tapurl>/tables`, but it may be influenced by the chosen `interface` value, and it can be further overridden by setting this value.
`tapurl = <url-value>` (URL)
  The base URL of a Table Access Protocol service. This is the bare URL without a trailing "/[a]sync".

  In the usual case, the default values of the various endpoints (sync and async query submission, tables metadata, service-provided examples etc) use this URL as a parent and append standard sub-paths.

  In some cases however, determination of the endpoints is more complicated, as determined by the `interface` parameter which may cause endpoints to be read from the capabilities document at `tapurl/capabilities`, and by other endpoint-specific parameters (`syncurl`, `asyncurl`, `tablesurl`, `capabilitiesurl`, `availabilityurl`, `examplesurl`) for fine tuning.

`truncate = <int-value>` (Integer)
  Limits the line length written to the output.

  [Default: `640`]

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STILTS - Starlink Tables Infrastructure Library Tool Set
Starlink User Note256
STILTS web page: http://www.starlink.ac.uk/stilts/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@jiscmail.ac.uk