(registered 2017-01-09, last updated 2017-01-09)
Media type name: application
Media subtype name: gml+xml
Required parameters: None
Optional parameters:
"charset": See Section 3 of RFC 7303.
"version": If provided, this parameter indicates the major and the first minor version number of the GML version used in the GML document, e.g. "3.2". Syntax:
version = 1*DIGIT "." 1*DIGIT
The first group of digits is the major version number, the second group is the minor version number.
In cases where elements from multiple GML versions are used, the parameter should indicate the highest GML version used in the document.
The parameter can be used to provide protocol-specific operations, such as version-based content negotiation in HTTP or in the OGC Web Feature Service.
The parameter is a hint, if used in HTTP content negotiation. I.e., client implementations should be prepared to receive content in a different version than requested and server implementations should honour the version parameter during content negotiation, if possible.
"profile": If provided, this parameter indicates the GML profiles that the GML document conforms to. This is consistent with the semantics of a profile as laid out in RFC 6906.
The parameter can also be used to provide protocol-specific operations, such as profile-based content negotiation in HTTP.
A profile is identified by a URI.
As a GML document may conform to more than one GML profile, the parameter value is a whitespace-separated list of profile URIs.
Syntax:
profile = URI *( 1*WSP URI )
The element "URI" is defined by Section 3 of RFC 3986.
Profile URIs are assigned by the publisher of the GML profile. The URI should be in the "http" URI scheme and, if dereferenced, should return information about the GML profile.
For example, version 2.0 of the GML Simple Feature Level 0 profile specified by OGC is identified by the URI "http://www.opengis.net/def/profile/ogc/2.0/gml-sf0".
Encoding considerations: Same as application/xml - see section 9.1 of RFC 7303.
Security considerations:
The OGC Geography Markup Language (GML) is a generic XML grammar for exchanging geographic information, but application designers must not assume that it provides generic protection against security threats. RFC 7303, Section 10, discusses security concerns for generic XML, which are also applicable to GML.
Xlink references in GML documents may cause arbitrary URIs to be dereferenced. In this case, the security issues of RFC 3986, section 7, should be considered.
GML documents do not contain active or executable content.
GML does not provide privacy or integrity services. If sensitive data requires privacy or integrity protection, those must be provided by the transport, for example, Transport Layer Security (TLS) or HTTPS. There will be cases in which stored data need protection, which is out of scope for this document.
The general considerations related to location information apply, for example, see RFC 7946, Section 10, Paragraph 3.
Interoperability considerations:
Different versions of GML specify different XML Schema documents used for the validation of GML documents. Starting with version 3.2, the GML version information is represented in the namespace. As applications may only support a subset of all published GML versions, the use of the version parameter is recommended.
An older version of the OGC Web Feature Service standard (version 1.1) has used unregistered and incorrect media types for GML documents in an HTTP query parameter "outputFormat", namely "text/xml; subtype=gml/2.1.2" and "text/xml; subtype=gml/3.1.1". Producers of GML documents should not use these strings for any other purpose than values of the "outputFormat" query parameter.
Published specification:
GML (Geography Markup Language) is an international standard adopted by both the Open Geospatial Consortium (OGC) and International Organization for Standardization (ISO).
The latest version at the time of writing is GML 3.3.
In ISO, GML is published as ISO 19136:2007 and ISO 19136-2:2015.
All versions of the standard can be accessed freely online at http://www.opengeospatial.org/standards/gml.
Applications which use this media:
GML is a generic device-, platform-, and vendor-neutral XML grammar and is supported by a range of applications creating, providing access to and processing geographic information. GML is in use internationally with hundreds of deployed applications able to create and ingest GML payloads, including all of the major GIS vendors, many database providers, earth browser applications, and so forth.
Fragment identifier considerations:
Fragement identifiers reference XML elements in the document. GML uses an attribute gml:id for such identifiers, which has the XML Schema type ID.
Restrictions on usage:
None
Provisional registration? (standards tree only):
As the media type is already in use in OGC standards (e.g., http://docs.opengeospatial.org/is/09-025r2/09-025r2.html) and software implementing the standards, a provisional registration would be appreciated.
Additional information:
1. Deprecated alias names for this type: None
2. Magic number(s): None
3. File extension(s): *.xml or *.gml
4. Macintosh file type code: TEXT
5. Object Identifiers: None
General Comments:
The OGC is an international voluntary consensus standards organization focused on defining and maintaining standards that enable interoperability for using geospatial content and services in any application that requires the use of geospatial content or services. The OGC website is www.opengeospatial.org.
Person to contact for further information:
1. Name: Clemens Portele
2. Email: portele&interactive-instruments.de
Intended usage: COMMON
Author/Change controller: The GML standard is a work product of the Open Geospatial Consortium (OGC). The OGC and the GML Standards Working Group have change control over the GML standard.
Media types for use in OGC standards and formats are defined by the OGC Members and discussed and approved by the OGC Naming Authority (OGC-NA). The function and role of the OGC-NA is described in RFC 5165 and in the OGC Policies and Procedures: http://docs.opengeospatial.org/pol/05-020r24/05-020r24.html Presently we were in a very dark road, and at a point where it dropped suddenly between steep sides we halted in black shadow. A gleam of pale sand, a whisper of deep flowing waters, and a farther glimmer of more sands beyond them challenged our advance. We had come to a "grapevine ferry." The scow was on the other side, the water too shoal for the horses to swim, and the bottom, most likely, quicksand. Out of the blackness of the opposite shore came a soft, high-pitched, quavering, long-drawn, smothered moan of woe, the call of that snivelling little sinner the screech-owl. Ferry murmured to me to answer it and I sent the same faint horror-stricken tremolo back. Again it came to us, from not farther than one might toss his cap, and I followed Ferry down to the water's edge. The grapevine guy swayed at our side, we heard the scow slide from the sands, and in a few moments, moved by two videttes, it touched our shore. Soon we were across, the two videttes riding with us, and beyond a sharp rise, in an old opening made by the swoop of a hurricane, we entered the silent unlighted bivouac of Ferry's scouts. Ferry got down and sat on the earth talking with Quinn, while the sergeants quietly roused the sleepers to horse. Plotinus is driven by this perplexity to reconsider the whole theory of Matter.477 He takes Aristotle¡¯s doctrine as the groundwork of his investigation. According to this, all existence is divided into Matter and Form. What we know of things¡ªin other words, the sum of their differential characteristics¡ªis their Form. Take away this, and the unknowable residuum is their Matter. Again, Matter is the vague indeterminate something out of which particular Forms are developed. The two are related as Possibility to Actuality, as the more generic to the more specific substance through every grade of classification and composition. Thus there are two Matters, the one sensible and the other intelligible. The former constitutes the common substratum of bodies, the other the common element of ideas.478 The general distinction between Matter and Form was originally suggested to Aristotle by Plato¡¯s remarks on the same subject; but he differs325 from his master in two important particulars. Plato, in his Timaeus, seems to identify Matter with space.479 So far, it is a much more positive conception than the ?λη of the Metaphysics. On the other hand, he constantly opposes it to reality as something non-existent; and he at least implies that it is opposed to absolute good as a principle of absolute evil.480 Thus while the Aristotelian world is formed by the development of Power into Actuality, the Platonic world is composed by the union of Being and not-Being, of the Same and the Different, of the One and the Many, of the Limit and the Unlimited, of Good and Evil, in varying proportions with each other. The Lawton woman had heard of an officer's family at Grant, which was in need of a cook, and had gone there. [See larger version] On the 8th of July an extraordinary Privy Council was summoned. All the members, of whatever party, were desired to attend, and many were the speculations as to the object of their meeting. The general notion was that it involved the continuing or the ending of the war. It turned out to be for the announcement of the king's intended marriage. The lady selected was Charlotte, the second sister of the Duke of Mecklenburg-Strelitz. Apart from the narrowness of her education, the young princess had a considerable amount of amiability, good sense, and domestic taste. These she shared with her intended husband, and whilst they made the royal couple always retiring, at the same time they caused them to give, during their lives, a moral air to their court. On the 8th of September Charlotte arrived at St. James's, and that afternoon the marriage took place, the ceremony being performed by the Archbishop of Canterbury. On the 22nd the coronation took place with the greatest splendour. Mother and girls were inconsolable, for each had something that they were sure "Si would like," and would "do him good," but they knew Josiah Klegg, Sr., well enough to understand what was the condition when he had once made up his mind. CHAPTER V. THE YOUNG RECRUITS Si proceeded to deftly construct a litter out of the two guns, with some sticks that he cut with a knife, and bound with pawpaw strips. His voice had sunk very low, almost to sweetness. A soft flurry of pink went over her face, and her eyelids drooped. Then suddenly she braced herself, pulled herself taut, grew combative again, though her voice shook. HoME²Ô¾®Ïè̫ʲôÐÇ×ù
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