Adding reference to external PDF on FHIR resource - hl7-fhir

I am wanting to add a reference to an external/3rd party PDF datasheet with more information on a Medication resource, am I best to add this as an extension with the Url of the extension pointing to the "home page" for the datasheets, and a valueString of the URL of the PDF (the PDFs are not currently available via an API).
For example, if I wanted to reference the PDF available at the following: https://www.medicines.org.uk/emc/files/pil.9845.pdf
I'd set the Url = https://www.medicines.org.uk/emc/ and the valueString = https://www.medicines.org.uk/emc/files/pil.9845.pdf

It would be better to use valueUri rather than valueString given that it's supposed to be a reference. Your alternative would be have the extension be valueReference that points to a DocumentReference which could then give some metadata about the PDF, but if you don't have that, a simple valueUri is fine. You might also look at the MedicationKnowledge resource, as the focus there is conveying more "drug masterfile" type information. Medication is more the resource sent with the prescription or dispense to describe exactly what was prescribed/dispensed, not to convey knowledge about it.

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How I can extract information from a website URL in dialogeflow knowledge base data feature that doesn't include Q&A base format?

In dialogeflow, We are using knowledge base data feature to extract information from a website URL.
Here are the steps, we followed:
#we have selected knowledge beta option(we have also enable beta features settings given in dialogeflow project).
We have created a new knowledge base and we are following below information to create a new document.
a. Given document name
b. Knowledge Type
c. mime type: Text/htcl
d. Data source?: URL
error image

How can I get a list of all CSGO items including skin name, quality and rarity?

I'm not looking for details of a specific player inventory, but a list of all items for CSGO. What I want is details of the weapons in particular, but including skin name information and rarity.
To make it easier to explain this site has the information I need, except rarity.
http://csgo.steamanalyst.com/list.php
By using the following api url I can get weapon model names but not skin names (ie. "Zirka")
http://api.steampowered.com/IEconItems_730/GetSchema/v0002/?key={YOUR_API_KEY}
I haven't found anything regarding skins in Steam Web Api.
Lists of all skins as well as rarity and corresponding weapons are in "paint_kits", "paint_kits_rarity" and "item_sets" sections of /csgo/scripts/items/items_game.txt file.
As for their correct names, those are in /csgo/resource/csgo_YOUR_LANGUAGE.txt. Looking like that
"PaintKit_so_red_Tag" "Candy Apple"
Won't be hard to make php or python script to get all of it and put it in a database for ease of use.
For skins images you could get weapon and skin name from the above, and do a foreach curl loop to get content from div with "market_listing_largeimage" class using for example simple_html_dom.php, from url http://steamcommunity.com/market/listings/730/{ITEM_NAME}%20%7C%20{SKIN_NAME}%20%28{USAGE_THINGY Ex. Well-Worn}%29
Just remember to replace all spaces going to the url with %20 but that depends on what you use to get the page. You could do a foreach on the usage thingy since some weapons don't have some variants on the market, curl could return wrong page. Nothing that a simple if+foreach couldn't fix.
Also do it only after skins update if overused you could get blocked from valve website for spamming. You could also use SteamWebApi and game news to check for new versions and update it automatically then. Just use your imagination and google.

What is the relationship between CGPDFContext and CGPDFDocument?

My understanding of this was that perhaps CGPDFContext is to be used for editing PDF document data and CGPDFDocument is used for storing it, since the documentation doesn't list any ways to alter the content of a CGPDFDocument.
I'm also not quite sure what CGDataConsumer/Provider does. From reading the documentation I got the impression that the consumer/provider abstracts the relationship between the CG object and the CFData it writes to; so I don't have to do that myself. So I figured the following code would create a two page blank PDFdocument:
//Don't know exactly how large a PDF is so I gave it 1 MB for now
self->pdfData = CFDataCreateMutable(kCFAllocatorDefault, 1024);
self->consumerRef = CGDataConsumerCreateWithCFData(self->pdfData);
self.pdfRef = CGPDFContextCreate(self->consumerRef, NULL, NULL);
CGPDFContextBeginPage(self.pdfRef, NULL); //Creates a blank page?
CGPDFContextEndPage(self.pdfRef);
CGPDFContextBeginPage(self.pdfRef, NULL); //Creates a second blank page?
CGPDFContextEndPage(self.pdfRef);
//Copies the data from pdfRef's consumer into docRef's provider?
self.docRef = CGPDFDocumentCreateWithProvider(
CGDataProviderCreateWithCFData(
CFDataCreateCopy(kCFAllocatorDefault, self->pdfData)
));
It didn't work though, and NSLogging the first two pages of docRef returns NULL. I'm rather new at this, the C-Layer stuff in particular. Can someone explain to me the relationship between CGPDFContext, CGPDFDocument, CGDataConsumer & CGDataProvider and how I'd use them to create a blank PDF?
Your basic understanding is correct as far as I can see:
A CGPDFContext is a drawing context that "translates" everything that is drawn onto it to PDF instructions (typically for storage in a PDF file).
A CGPDFDocument is used to open an existing PDF file and get information from it.
When you want to create your own PDF file, you have two ways to do it as described here: https://developer.apple.com/library/mac/documentation/graphicsimaging/reference/CGPDFContext/Reference/reference.html
Use "CGPDFContextCreate" which you pass a data consumer. The data consumer gets the data and can do with it as it pleases (you could create a data consumer that passes the PDF onto the clipboard for example).
Use "CGPDFContextCreateWithURL" which you pass a URL. In that case your data will be written to a PDF file at that URL.
If you want to use these functions, have a look at this page https://developer.apple.com/library/mac/documentation/graphicsimaging/Conceptual/drawingwithquartz2d/dq_pdf/dq_pdf.html#//apple_ref/doc/uid/TP30001066-CH214-TPXREF101 which explains in detail how to create PDF files with a data provider and without (simply to a PDF).
To figure out what is happening I would start by trying to write a simple PDF file to disk before writing one to a data provider and then using that data provider immediately to read it again. Without trying your code however, let me point out that you didn't use "CGPDFContextClose" which is described in the document as closing the PDF document and flushing all information to output. You could actually having a situation where stuff is cached and not written to your data provider yet, simply because you haven't forced that.

How to serve static profile images in node

This is really more of a "using what method" than a "how-to" question. I am creating a site in NodeJS with Express. So, each user has the ability to upload a profile picture, and my concern is how to route requests for these images. A couple of questions I have are:
Can I use express.static() to serve a default file if a valid one isn't specified? If not, am I going to have to specify a GET route for /img/profileand handle the FS querying there?
How can I find the correct image if multiple file extensions are allowed? (I originally just removed the file extension and they appeared in img tags anyway, is that okay?)
I am currently naming all pictures after their user's name. Looking ahead into the future (for apps I may have to scale), what are normal naming conventions for static user content? Are most stored with a UUID referencing the content in the database?
What else should I take into consideration that I may not have accounted for yet?
First question:
At present, I'd recommend storing your images in a predictable location that can be inferred from some combination of columns or fields in your database entries. One of those fields or columns would be a filename (accounts for different extensions). Then, if they haven't uploaded an image, you just lay down in your view code a reference to the generic "has not set an image" file.
express.static obviously can server static files, but it currently doesn't have a way to serve some other file if the one you wanted isn't there. Because this sounded like fun, I made some modifications to static to support what you request and submitted a couple of pull requests (the feature touched 2 different modules):
In send: https://github.com/visionmedia/send/pull/33
In connect: https://github.com/senchalabs/connect/pull/999
I don't know if those will get included in the project, but if you want to see my forks that have these changes, they are here:
https://github.com/bigohstudios/send
https://github.com/bigohstudios/connect
If this went through, you would mount a static at the root of your profile image files:
app.use(static('<profile image files root>', { fallback: 'anon.jpg'}))
Second question
I generally store the extension in my DB, then when I load the image, I have the correct extension to put into the src attribute on the img tag.
Third question
If you can guarantee unique names, then using those would work. I prefer using the DB id or a UUID as you suggest. It's less intuitive when scanning all the image uploads, but I rarely find myself doing that. I'm usually hunting for a specific image, and I can look up the identifier for that as needed.
Fourth question
You may end up storing the static content outside your app server (e.g. on S3). If that happens, then of course static won't help you.

Project references with microdata

I have a site where I need to list my projects from before. They are websites with name, URL, description, list of used technologies, and an image gallery.
I was searching for a schema for it on schema.org, but I was not able to find a fitting one. What itemscopes should I use?
There is no good fit for what you need in the current available Schemas on http://schema.org.
What I'd do:
Use http://schema.org/WebPage for your webpage definition, along with parts of http://schema.org/WebPageElement as needed.
Use http://schema.org/Person for defining yourself
Lastly for each project, I'd use what's already there for the parent Creative Work schema (http://schema.org/CreativeWork) since there is no sub-schema under it that fits for you. I'd then just define attributes and values for about, datePublished, author, headline, keywords. Also define editor, video, awards and publisher if appropriate.

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