Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.11/site-packages/icalendar/param.py: 54%

1"""Parameter access for icalendar.

3Related:

5- :rfc:`5545`, Section 3.2. Property Parameters

6- :rfc:`7986`, Section 6. Property Parameters

7- :rfc:`9253`

8- https://github.com/collective/icalendar/issues/798

9"""

11from __future__ import annotations

13import functools

14from datetime import timedelta

15from typing import TYPE_CHECKING, Callable, Optional, TypeVar

17from icalendar import enums

19if TYPE_CHECKING:

20 from enum import Enum

23if TYPE_CHECKING:

24 from icalendar.prop import VPROPERTY

27def _default_return_none() -> Optional[str]:

28 """Return None by default."""

29 return None

32def _default_return_string() -> str:

33 """Return None by default."""

34 return ""

37T = TypeVar("T")

40def string_parameter(

41 name: str,

42 doc: str,

43 default: Callable = _default_return_none,

44 convert: Optional[Callable[[str], T]] = None,

45 convert_to: Optional[Callable[[T], str]] = None,

46) -> property:

47 """Return a parameter with a quoted value (case sensitive)."""

49 if convert_to is None:

50 convert_to = convert

52 @functools.wraps(default)

53 def fget(self: VPROPERTY) -> Optional[str]:

54 value = self.params.get(name)

55 if value is None:

56 return default()

57 return convert(value) if convert else value

59 def fset(self: VPROPERTY, value: str | None):

60 if value is None:

61 fdel(self)

62 else:

63 self.params[name] = convert_to(value) if convert_to else value

65 def fdel(self: VPROPERTY):

66 self.params.pop(name, None)

68 return property(fget, fset, fdel, doc=doc)

71ALTREP = string_parameter(

72 "ALTREP",

73 """ALTREP - Specify an alternate text representation for the property value.

75Description:

76 This parameter specifies a URI that points to an

77 alternate representation for a textual property value. A property

78 specifying this parameter MUST also include a value that reflects

79 the default representation of the text value. The URI parameter

80 value MUST be specified in a quoted-string.

82.. note::

84 While there is no restriction imposed on the URI schemes

85 allowed for this parameter, Content Identifier (CID) :rfc:`2392`,

86 HTTP :rfc:`2616`, and HTTPS :rfc:`2818` are the URI schemes most

87 commonly used by current implementations.

88""",

89)

91CN = string_parameter(

92 "CN",

93 """Specify the common name to be associated with the calendar user specified.

95Description:

96 This parameter can be specified on properties with a

97 CAL-ADDRESS value type. The parameter specifies the common name

98 to be associated with the calendar user specified by the property.

99 The parameter value is text. The parameter value can be used for

100 display text to be associated with the calendar address specified

101 by the property.

102""",

103 default=_default_return_string,

104)

105

106

107def _default_return_individual() -> enums.CUTYPE | str:

108 """Default value."""

109 return enums.CUTYPE.INDIVIDUAL

110

111

112def _convert_enum(enum: type[Enum]) -> Callable[[str], Enum]:

113 def convert(value: str) -> str:

114 """Convert if possible."""

115 try:

116 return enum(value.upper())

117 except ValueError:

118 return value

119

120 return convert

121

122

123CUTYPE = string_parameter(

124 "CUTYPE",

125 """Identify the type of calendar user specified by the property.

126

127Description:

128 This parameter can be specified on properties with a

129 CAL-ADDRESS value type. The parameter identifies the type of

130 calendar user specified by the property. If not specified on a

131 property that allows this parameter, the default is INDIVIDUAL.

132 Applications MUST treat x-name and iana-token values they don't

133 recognize the same way as they would the UNKNOWN value.

134""",

135 default=_default_return_individual,

136 convert=_convert_enum(enums.CUTYPE),

137)

138

139

140def quoted_list_parameter(name: str, doc: str) -> property:

141 """Return a parameter that contains a quoted list."""

142

143 def fget(self: VPROPERTY) -> tuple[str]:

144 value = self.params.get(name)

145 if value is None:

146 return ()

147 if isinstance(value, str):

148 return tuple(value.split(","))

149 return value

150

151 def fset(self: VPROPERTY, value: str | tuple[str]):

152 if value == ():

153 fdel(self)

154 else:

155 self.params[name] = (value,) if isinstance(value, str) else value

156

157 def fdel(self: VPROPERTY):

158 self.params.pop(name, None)

159

160 return property(fget, fset, fdel, doc=doc)

161

162

163DELEGATED_FROM = quoted_list_parameter(

164 "DELEGATED-FROM",

165 """Specify the calendar users that have delegated their participation to the calendar user specified by the property.

166

167Description:

168 This parameter can be specified on properties with a

169 CAL-ADDRESS value type. This parameter specifies those calendar

170 users that have delegated their participation in a group-scheduled

171 event or to-do to the calendar user specified by the property.

172 The individual calendar address parameter values MUST each be

173 specified in a quoted-string.

174""", # noqa: E501

175)

176

177DELEGATED_TO = quoted_list_parameter(

178 "DELEGATED-TO",

179 """Specify the calendar users to whom the calendar user specified by the property has delegated participation.

180

181Description:

182 This parameter can be specified on properties with a

183 CAL-ADDRESS value type. This parameter specifies those calendar

184 users whom have been delegated participation in a group-scheduled

185 event or to-do by the calendar user specified by the property.

186 The individual calendar address parameter values MUST each be

187 specified in a quoted-string.

188 """, # noqa: E501

189)

190

191DIR = string_parameter(

192 "DIR",

193 """Specify reference to a directory entry associated with the calendar user specified by the property.

194

195Description:

196 This parameter can be specified on properties with a

197 CAL-ADDRESS value type. The parameter specifies a reference to

198 the directory entry associated with the calendar user specified by

199 the property. The parameter value is a URI. The URI parameter

200 value MUST be specified in a quoted-string.

201

202.. note::

203

204 While there is no restriction imposed on the URI schemes

205 allowed for this parameter, CID :rfc:`2392`, DATA :rfc:`2397`, FILE

206 :rfc:`1738`, FTP :rfc:`1738`, HTTP :rfc:`2616`, HTTPS :rfc:`2818`, LDAP

207 :rfc:`4516`, and MID :rfc:`2392` are the URI schemes most commonly

208 used by current implementations.

209""", # noqa: E501

210)

211

212

213def _default_return_busy() -> enums.FBTYPE | str:

214 """Default value."""

215 return enums.FBTYPE.BUSY

216

217

218FBTYPE = string_parameter(

219 "FBTYPE",

220 """Specify the free or busy time type.

221

222Description:

223 This parameter specifies the free or busy time type.

224 The value FREE indicates that the time interval is free for

225 scheduling. The value BUSY indicates that the time interval is

226 busy because one or more events have been scheduled for that

227 interval. The value BUSY-UNAVAILABLE indicates that the time

228 interval is busy and that the interval can not be scheduled. The

229 value BUSY-TENTATIVE indicates that the time interval is busy

230 because one or more events have been tentatively scheduled for

231 that interval. If not specified on a property that allows this

232 parameter, the default is BUSY. Applications MUST treat x-name

233 and iana-token values they don't recognize the same way as they

234 would the BUSY value.

235""",

236 default=_default_return_busy,

237 convert=_convert_enum(enums.FBTYPE),

238)

239

240LANGUAGE = string_parameter(

241 "LANGUAGE",

242 """Specify the language for text values in a property or property parameter.

243

244Description:

245 This parameter identifies the language of the text in

246 the property value and of all property parameter values of the

247 property. The value of the "LANGUAGE" property parameter is that

248 defined in :rfc:`5646`.

249

250 For transport in a MIME entity, the Content-Language header field

251 can be used to set the default language for the entire body part.

252 Otherwise, no default language is assumed.

253""",

254)

255

256MEMBER = quoted_list_parameter(

257 "MEMBER",

258 """Specify the group or list membership of the calendar user specified by the property.

259

260Description:

261 This parameter can be specified on properties with a

262 CAL-ADDRESS value type. The parameter identifies the groups or

263 list membership for the calendar user specified by the property.

264 The parameter value is either a single calendar address in a

265 quoted-string or a COMMA-separated list of calendar addresses,

266 each in a quoted-string. The individual calendar address

267 parameter values MUST each be specified in a quoted-string.

268""", # noqa: E501

269)

270

271

272def _default_return_needs_action() -> enums.PARTSTAT | str:

273 """Default value."""

274 return enums.PARTSTAT.NEEDS_ACTION

275

276

277PARTSTAT = string_parameter(

278 "PARTSTAT",

279 """Specify the participation status for the calendar user specified by the property.

280

281Description:

282 This parameter can be specified on properties with a

283 CAL-ADDRESS value type. The parameter identifies the

284 participation status for the calendar user specified by the

285 property value. The parameter values differ depending on whether

286 they are associated with a group-scheduled "VEVENT", "VTODO", or

287 "VJOURNAL". The values MUST match one of the values allowed for

288 the given calendar component. If not specified on a property that

289 allows this parameter, the default value is NEEDS-ACTION.

290 Applications MUST treat x-name and iana-token values they don't

291 recognize the same way as they would the NEEDS-ACTION value.

292""",

293 default=_default_return_needs_action,

294 convert=_convert_enum(enums.PARTSTAT),

295)

296

297

298def _default_range_none() -> Optional[enums.RANGE | str]:

299 return None

300

301

302RANGE = string_parameter(

303 "RANGE",

304 """Specify the effective range of recurrence instances from the instance specified by the recurrence identifier specified by the property.

305

306Description:

307 This parameter can be specified on a property that

308 specifies a recurrence identifier. The parameter specifies the

309 effective range of recurrence instances that is specified by the

310 property. The effective range is from the recurrence identifier

311 specified by the property. If this parameter is not specified on

312 an allowed property, then the default range is the single instance

313 specified by the recurrence identifier value of the property. The

314 parameter value can only be "THISANDFUTURE" to indicate a range

315 defined by the recurrence identifier and all subsequent instances.

316 The value "THISANDPRIOR" is deprecated by this revision of

317 iCalendar and MUST NOT be generated by applications.

318""", # noqa: E501

319 default=_default_range_none,

320 convert=_convert_enum(enums.RANGE),

321)

322

323

324def _default_related() -> enums.RELATED | str:

325 return enums.RELATED.START

326

327

328RELATED = string_parameter(

329 "RELATED",

330 """Specify the relationship of the alarm trigger with respect to the start or end of the calendar component.

331

332Description:

333 This parameter can be specified on properties that

334 specify an alarm trigger with a "DURATION" value type. The

335 parameter specifies whether the alarm will trigger relative to the

336 start or end of the calendar component. The parameter value START

337 will set the alarm to trigger off the start of the calendar

338 component; the parameter value END will set the alarm to trigger

339 off the end of the calendar component. If the parameter is not

340 specified on an allowable property, then the default is START.

341

342""", # noqa: E501

343 default=_default_related,

344 convert=_convert_enum(enums.RELATED),

345)

346

347

348def _default_req_participant() -> enums.ROLE | str:

349 return enums.ROLE.REQ_PARTICIPANT

350

351

352ROLE = string_parameter(

353 "ROLE",

354 """Specify the participation role for the calendar user specified by the property.

355

356Description:

357 This parameter can be specified on properties with a

358 CAL-ADDRESS value type. The parameter specifies the participation

359 role for the calendar user specified by the property in the group

360 schedule calendar component. If not specified on a property that

361 allows this parameter, the default value is REQ-PARTICIPANT.

362 Applications MUST treat x-name and iana-token values they don't

363 recognize the same way as they would the REQ-PARTICIPANT value.

364""",

365 default=_default_req_participant,

366 convert=_convert_enum(enums.ROLE),

367)

368

369

370def boolean_parameter(name: str, default: bool, doc: str) -> property: # noqa: FBT001

371 def _default() -> bool:

372 return default

373

374 return string_parameter(

375 name,

376 doc,

377 default=_default,

378 convert=lambda x: x.upper() == "TRUE",

379 convert_to=lambda x: "TRUE" if x else "FALSE",

380 )

381

382

383RSVP = boolean_parameter(

384 "RSVP",

385 False, # noqa: FBT003

386 """Specify whether there is an expectation of a favor of anreply from the calendar user specified by the property value.

387

388Description:

389 This parameter can be specified on properties with a

390 CAL-ADDRESS value type. The parameter identifies the expectation

391 of a reply from the calendar user specified by the property value.

392 This parameter is used by the "Organizer" to request a

393 participation status reply from an "Attendee" of a group-scheduled

394 event or to-do. If not specified on a property that allows this

395 parameter, the default value is ``False``.

396""", # noqa: E501

397)

398

399SENT_BY = string_parameter(

400 "SENT-BY",

401 """Specify the calendar user that is acting on behalf of the calendar user specified by the property.

402

403Description:

404 This parameter can be specified on properties with a

405 CAL-ADDRESS value type. The parameter specifies the calendar user

406 that is acting on behalf of the calendar user specified by the

407 property. The parameter value MUST be a mailto URI as defined in

408 :rfc:`2368`. The individual calendar address parameter values MUST

409 each be specified in a quoted-string.

410""", # noqa: E501

411)

412

413TZID = string_parameter(

414 "TZID",

415 """Specify the identifier for the time zone definition for a time component in the property value.

416

417Description:

418 This parameter MUST be specified on the "DTSTART",

419 "DTEND", "DUE", "EXDATE", and "RDATE" properties when either a

420 DATE-TIME or TIME value type is specified and when the value is

421 neither a UTC or a "floating" time. Refer to the DATE-TIME or

422 TIME value type definition for a description of UTC and "floating

423 time" formats. This property parameter specifies a text value

424 that uniquely identifies the "VTIMEZONE" calendar component to be

425 used when evaluating the time portion of the property. The value

426 of the "TZID" property parameter will be equal to the value of the

427 "TZID" property for the matching time zone definition. An

428 individual "VTIMEZONE" calendar component MUST be specified for

429 each unique "TZID" parameter value specified in the iCalendar

430 object.

431

432 The parameter MUST be specified on properties with a DATE-TIME

433 value if the DATE-TIME is not either a UTC or a "floating" time.

434 Failure to include and follow VTIMEZONE definitions in iCalendar

435 objects may lead to inconsistent understanding of the local time

436 at any given location.

437

438 The presence of the SOLIDUS character as a prefix, indicates that

439 this "TZID" represents a unique ID in a globally defined time zone

440 registry (when such registry is defined).

441

442.. note::

443

444 This document does not define a naming convention for

445 time zone identifiers. Implementers may want to use the naming

446 conventions defined in existing time zone specifications such

447 as the public-domain TZ database (TZDB). The specification of

448 globally unique time zone identifiers is not addressed by this

449 document and is left for future study.

450""", # noqa: E501

451)

452

453

454def _default_return_parent() -> enums.RELTYPE:

455 return enums.RELTYPE.PARENT

456

457

458RELTYPE = string_parameter(

459 "RELTYPE",

460 """Specify the type of hierarchical relationship associated with a component.

461

462Conformance:

463 :rfc:`5545` introduces the RELTYPE property parameter.

464 :rfc:`9253` adds new values.

465

466Description:

467 This parameter can be specified on a property that

468 references another related calendar. The parameter specifies the

469 hierarchical relationship type of the calendar component

470 referenced by the property. The parameter value can be PARENT, to

471 indicate that the referenced calendar component is a superior of

472 calendar component; CHILD to indicate that the referenced calendar

473 component is a subordinate of the calendar component; or SIBLING

474 to indicate that the referenced calendar component is a peer of

475 the calendar component. If this parameter is not specified on an

476 allowable property, the default relationship type is PARENT.

477 Applications MUST treat x-name and iana-token values they don't

478 recognize the same way as they would the PARENT value.

479""",

480 default=_default_return_parent,

481 convert=_convert_enum(enums.RELTYPE),

482)

483

484

485def _get_value(self: VPROPERTY) -> str:

486 """The VALUE parameter or the default.

487

488 Purpose:

489 VALUE explicitly specify the value type format for a property value.

490

491 Description:

492 This parameter specifies the value type and format of

493 the property value. The property values MUST be of a single value

494 type. For example, a "RDATE" property cannot have a combination

495 of DATE-TIME and TIME value types.

496

497 If the property's value is the default value type, then this

498 parameter need not be specified. However, if the property's

499 default value type is overridden by some other allowable value

500 type, then this parameter MUST be specified.

501

502 Applications MUST preserve the value data for ``x-name`` and

503 ``iana-token`` values that they don't recognize without attempting

504 to interpret or parse the value data.

505

506 Returns:

507 The VALUE parameter or the default.

508

509 Examples:

510 The VALUE defaults to the name of the property.

511 Note that it is case-insensitive but always uppercase.

512

513 .. code-block:: pycon

514

515 >>> from icalendar import vBoolean

516 >>> b = vBoolean(True)

517 >>> b.VALUE

518 'BOOLEAN'

519

520 Setting the VALUE parameter of a typed property usually does not make sense.

521 For convenience, using this property, the value will be converted to

522 an uppercase string.

523 If you have some custom property, you might use it like this:

524

525 .. code-block:: pycon

526

527 >>> from icalendar import vUnknown, Event

528 >>> v = vUnknown("Some property text.")

529 >>> v.VALUE = "x-type" # lower case

530 >>> v.VALUE

531 'X-TYPE'

532 >>> event = Event()

533 >>> event.add("x-prop", v)

534 >>> print(event.to_ical())

535 BEGIN:VEVENT

536 X-PROP;VALUE=X-TYPE:Some property text.

537 END:VEVENT

538

539 """

540 value = self.params.value

541 if value is None:

542 _get_default_value = getattr(self, "_get_value", None)

543 if _get_default_value is not None:

544 value = _get_default_value()

545 return self.default_value if value is None else value

546

547

548def _set_value(self: VPROPERTY, value: str | None):

549 """Set the VALUE parameter."""

550 self.params.value = value

551

552

553def _del_value(self: VPROPERTY):

554 """Delete the VALUE parameter."""

555 del self.params.value

556

557

558VALUE = property(_get_value, _set_value, _del_value)

559

560LABEL = string_parameter(

561 "LABEL",

562 """LABEL provides a human-readable label.

563

564Conformance:

565 This property parameter is specified in :rfc:`7986`,

566 iCalendar Property Extensions.

567

568 :rfc:`9253` makes use of this for the LINK property.

569 This parameter maps to the "title"

570 attribute defined in Section 3.4.1 of :rfc:`8288`.

571 LABEL is used to label the destination

572 of a link such that it can be used as a human-readable identifier

573 (e.g., a menu entry) in the language indicated by the LANGUAGE

574 (if present). The LABEL MUST NOT

575 appear more than once in a given link; occurrences after the first

576 MUST be ignored by parsers.

577

578Description:

579 This property parameter MAY be specified on the

580 "CONFERENCE" property. It is anticipated that other extensions to

581 iCalendar will reuse this property parameter on new properties

582 that they define. As a result, clients MUST expect to find this

583 property parameter present on many different properties. It

584 provides a human-readable label that can be presented to calendar

585 users to allow them to discriminate between properties that might

586 be similar or provide additional information for properties that

587 are not self-describing. The "LANGUAGE" property parameter can be

588 used to specify the language of the text in the parameter value

589 (as per Section 3.2.10 of :rfc:`5545`).

590

591Examples:

592 This is a label of a chat.

593

594 .. code-block:: text

595

596 CONFERENCE;VALUE=URI;FEATURE=VIDEO;

597 LABEL="Web video chat, access code=76543";

598 :https://video-chat.example.com/;group-id=1234

599

600""",

601)

602

603FMTTYPE = string_parameter(

604 "FMTTYPE",

605 """FMTTYPE specfies the content type of a referenced object.

606

607Conformance:

608 :rfc:`5545` specifies the FMTTYPE.

609 :rfc:`9253` adds FMTTYPE to LINK properties. In a LINK,

610 FMTTYPE maps to the "type"

611 attribute defined in Section 3.4.1 of :rfc:`8288`.

612 See :rfc:`6838`.

613

614Description:

615 This parameter can be specified on properties that are

616 used to reference an object. The parameter specifies the media

617 type :rfc:`4288` of the referenced object. For example, on the

618 "ATTACH" property, an FTP type URI value does not, by itself,

619 necessarily convey the type of content associated with the

620 resource. The parameter value MUST be the text for either an

621 IANA-registered media type or a non-standard media type.

622

623Example:

624 A Microsoft Word document:

625

626 .. code-block:: text

627

628 ATTACH;FMTTYPE=application/msword:ftp://example.com/pub/docs/

629 agenda.doc

630

631 A website:

632

633 .. code-block:: text

634

635 LINK;FMTTYPE=text/html;LINKREL=SOURCE;LABEL=Venue;VALUE=URI:

636 https://example.com/venue

637

638 """,

639)

640

641LINKREL = string_parameter(

642 "LINKREL",

643 """LINKREL

644

645Purpose:

646 LINKREL specifies the relationship of data referenced

647 by a LINK property.

648

649Conformance:

650 LINKREL is specified in :rfc:`9253`.

651 This parameter maps to the link relation type defined in

652 Section 2.1 of :rfc:`8288`.

653 It is always quoted.

654

655Description:

656 This parameter MUST be specified on all LINK properties and define

657 the type of reference.

658 This allows programs consuming this data to automatically scan

659 for references they support.

660 There is no default relation type. Any link relation in the

661 link registry established by :rfc:`8288`, or new link relations,

662 may be used.

663 It is expected that link relation types seeing significant usage

664 in calendaring will have the calendaring usage described in an RFC.

665

666 In the simplest case, a link relation type identifies the semantics

667 of a link. For example, a link with the relation type "copyright"

668 indicates that the current link context has a copyright resource at

669 the link target.

670

671 Link relation types can also be used to indicate that the target

672 resource has particular attributes, or exhibits particular

673 behaviours; for example, a "service" link implies that the link

674 target can be used as part of a defined protocol (in this case, a

675 service description).

676

677Registration:

678 There are two kinds of relation types: registered and extension.

679 These relation types are registered in :rfc:`8288`.

680

681.. seealso::

682

683 `Registered Link Relation Types

684 <https://www.iana.org/assignments/link-relations/link-relations.xhtml>`_.

685

686

687Examples:

688 This identifies the latest version of the event information.

689

690 .. code-block:: text

691

692 LINKREL=latest-version

693

694""",

695)

696

697

698def _get_GAP(prop) -> timedelta | None: # noqa: N802

699 """GAP

700

701 Purpose:

702 GAP specifies the length of the gap, positive or negative,

703 between two components with a temporal relationship.

704

705 Format Definition:

706 Same as the DURATION value type defined in :rfc:`5545`, Section 3.3.6.

707

708 Description:

709 This parameter MAY be specified on the RELATED-TO property and defines

710 the duration of time between the predecessor and successor in an interval.

711 When positive, it defines the lag time between a task and its logical successor.

712 When negative, it defines the lead time.

713

714 Examples:

715 An example of lag time might be if Task-A is "paint the room" and Task-B is

716 "lay the carpets". Then, Task-A may be related to Task-B with

717 RELTYPE=FINISHTOSTART with a gap of 1 day -- long enough for the paint to dry.

718

719 .. code-block:: text

720

721 ====================

722 | paint the room |--+

723 ==================== |

724 |(lag of one day)

725 |

726 | ===================

727 +->| lay the carpet |

728 ===================

729

730 For an example of lead time, in constructing a two-story building,

731 the electrical work must be done before painting. However,

732 the painter can move in to the first floor as the electricians move upstairs.

733

734 .. code-block:: text

735

736 =====================

737 | electrical work |--+

738 ===================== |

739 +-------------+

740 |(lead of estimated time)

741 | ==================

742 +->| painting |

743 ==================

744 """

745 value = prop.params.get("GAP")

746 if value is None:

747 return None

748 from icalendar.prop import vDuration

749

750 if isinstance(value, str):

751 return vDuration.from_ical(value)

752 if not isinstance(value, vDuration):

753 raise TypeError("Value MUST be a vDuration instance")

754 return value.td

755

756

757def _set_GAP(prop, value: timedelta | str | None): # noqa: N802

758 """Set the GAP parameter as a timedelta."""

759 if value is None:

760 prop.params.pop("GAP", None)

761 return

762 from icalendar.prop import vDuration

763

764 prop.params["GAP"] = vDuration(value)

765

766

767def _del_GAP(prop): # noqa: N802

768 """Delete the GAP parameter."""

769 prop.params.pop("GAP", None)

770

771

772GAP = property(_get_GAP, _set_GAP, _del_GAP)

773

774__all__ = [

775 "ALTREP",

776 "CN",

777 "CUTYPE",

778 "DELEGATED_FROM",

779 "DELEGATED_TO",

780 "DIR",

781 "FBTYPE",

782 "FMTTYPE",

783 "GAP",

784 "LABEL",

785 "LANGUAGE",

786 "LINKREL",

787 "MEMBER",

788 "PARTSTAT",

789 "RANGE",

790 "RELATED",

791 "ROLE",

792 "RSVP",

793 "SENT_BY",

794 "TZID",

795 "VALUE",

796 "quoted_list_parameter",

797 "string_parameter",

798]