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RDF Writing

2005 Errata and book updates: Chapter 1

I still like my analogy to the elephant and the blind men, in chapter 1. People still see RDF, and more generally, the Semantic Web (or my preferred, the lowercase semantic web), from different viewpoints, and with different expectations. That hasn’t changed, and by the nature of the beast, never will.

Good. Keeps life interesting.

The W3C RDF working group has issued new and revised versions of the RDF specifications. This doesn’t impact on Chapter 1 that much, but will in the other chapters, and where differences in the writing as compared to the specifications arise, I will make a note.

One change in the book is that any reference to the URI yasd.com has no relevance to anything actually existing. I dropped this domain when it was so badly overrun with email spam, it was no longer usable. As for the URLs in the chapter, those related to the specifications are:

RDF/XML Syntax Specification (revised)

RDF Vocabulary Description Language 1.0: RDF Schema

The RDF Primer

Resource Description Framework (RDF): Concepts and Abstract Syntax

RDF Semantics

RDF Test Cases

The graphic depicting the differences between RDF/XML and XML by Semaview no longer exists; sorry about that. However, I do believe my textual description does a decent job of explaining the difference. Comments, though, are welcome on this.

Page 8 references the ‘new’ ontology language work. Well, this group released specifications the same time as the final specifications were released for RDF, and can still be found here.

As for the rest of the chapter, most of the material in chapter 1 is more of a introduction for the rest of the book, so I’ll be updating the material as we come to it in the other chapters.

Categories
Burningbird

Good news bad news

The Good News is: The trackback and comment spammers couldn’t get through while my ISP was under DDoS attack this evening.

Categories
RDF Writing

Reviews and updated chapters

Recovered from the Wayback Machine.

I just read a review of Practical RDF out at Amazon that wasn’t very complimentary. In fact, I’ve had few complimentary reviews of the book, which can happen with a book. Sometimes you hit; sometimes you miss.

I can’t do much about the typos in the book (though these really were not as extensive as people say and have been corrected as errata at the book site at O’Reilly), because there won’t be a new edition of the book to make these corrections. I also can’t correct the style issues that have upset many of the readers, for the same reason – again, no new edition. But I can do something about new releases of technology that have happened since the book was first written.

I’ve already done so with the Java sections, but I think a better approach is for me to just go through each chapter at a time, and provide updated examples, new and updated information, and corrected links. I’ll then link these in the sidebar so that they’re easily accessible, and see if I can get O’Reilly to link to these chapter updates from the main book site. My hope is to have these updates done by end of January.

It’s not much, but it’s something I guess.

Categories
Just Shelley

What the bluebirds and the cardinals say

The St. Louis metropolitan area lost its last chance for a White Christmas when the major storm headed our way was actually pushed to the south of us by our cold, blustery weather.

A few years back, I would have been disappointed, but now I’m philosophical, having learned to let go of all holiday expectations. Now I see the lack of snow giving me an opportunity to spend Christmas out in the hills. My holiday icicles will be splashes of stream frozen in mid-air, my bright spots of color red cardinals in among the few southern green pines. There will be no church and no yule pudding, and my Christmas dinner will be sandwiches made with the Honey Baked ham I splurged on earlier in the week.

Big ham, too. We had salad and ham on Monday and ham and crunchy bread and artichoke and spinach dip on Tuesday and tonight we had the ham with sweet potato souffle and steamed broccoli, cauliflower, and carrots. This will work through tomorrow, and Friday it will be ham and cheese omelets and Texas bread.

Saturday then will be sandwiches on the hill, with the pecan and apricot fruitcake my Mom sent, left over veggies with dip, and hot tomato soup in a thermos, and maybe a small bottle of wine–just enough for a glass, as I’m driving.

By Saturday night, we’ll be down to the bone, which I’ll use to make navy bean and ham soup; combined with fresh cornbread, this will serve for a few meals in the coming week. I’ll have a glass of eggnog and a bit of fudge a friend of roommate’s sent home and I’m saving, and watch a good movie on TV–after calling a few friends and family and giving them my love.

I’ve been reading the various debates about religion and Christmas that have been argued here and there among some of the more popular webloggers. Who would have imagined that such passion and acrimony could result from something as simple as what holiday we celebrate, and what greetings we give each other. We had a red and blue election, must we now have a red and blue holiday season, too?

Happy Holidays, Happy Chanukah, Seasons Greetings, Merry Christmas, Happy Kwanzaa–it doesn’t matter what you say to me, as long as there’s a smile in there somewhere. I’m a sucker for genuine expressions of affection.

I think these people should consider putting away their aggregators and their iPods, turning off their computers, and join me on my hill for the day. I’ll share my sandwiches and soup and we can sit quietly, and hear what the cardinals and bluebirds call the day.

Happy “whoit, whoit, whir-a-chee!” everyone.

Categories
Just Shelley outdoors Photography Places

Listening to your inner monkey

The photos in the last post were from a hike I took to Crane Lake on Sunday. I read in this new hiking book I bought, that it was an ‘easy/moderate’ hike, with a north loop of 3 miles around the lake; a southern loop 2 miles in length, with an end at the dam and around yet another shut-ins.

I had hoped to make both loops, it being easy and all, but ended up getting lost on the way. I ended up on a dirt and rock road leading into the interior of the Ozarks, past national forest land and small, old homes tucked into hills and hollows. The homes had signs posted on them–the usual with ‘Keep Out’, and ‘Private Property’. All except one that had a skull painted on a black board with ‘Keep out…or else’.

Finally I found the parking lot for the lake. It was cold Sunday, but a beautiful sunny day, so I was surprised not to see anyone else there. Still, I like having hikes to myself, so made no never mind to me. (That’s a genuine Ozarks expression — I’m adapting.) It was too late, though, for both loops and I’d have to settle for just the north one around the lake.

The hike started out easy, until reached the first hill to climb down. I found the ground covered with inches of dead leaves, and I couldn’t see the footing. I ended up sliding on the gravel and tripping over rocks. The little monkey in the back of my brain was wide awake, and though it wasn’t banging at my head, it was trying to make me aware that all journeys have an option: to go on, or turn back. I thought about turning around, but remembered that the hike was ‘easy’, and I wanted to see the shut-ins.

The rest of the trail worsened, obstacles buried under too many leaves to see, twisting my ankle, and constantly having to catch at the hiking stick to keep from falling. Again I thought about turning around, but figured it might be easier returning on the other side of the lake. Besides, I wanted to see the old dam, take some photos of it.

The trail turned into the forest away from the lake, and connected up with the Maple Creek section of the Ozarks Trail. It flattened, which was good. Unfortunately, while keeping my eyes down to avoid rocks, I also managed to miss the trail markers. Another aspect of hiking in the winter, just after the leaves fall, is that they can obliterate an already hard to see trail.

No worries, though — when you hike around water, you can always find the path again. It’s just that sometimes when you go off the path, the way isn’t always easy going. Still, I headed in towards the water, found the dam, struggled through the trees and branches and grabbed a picture of it from the side, turned around, and noticed a half torn off white diamond on a tree. I’d found the trail again.

Above the dam was the beginning boulders signaling the shut-ins, but I couldn’t see any indication of where the trail led. The sun was going down, a lot faster than I thought it should, and the path was further obscured by the long shadows of the white oaks I was walking through. Long shadows are not a day hiker’s friend.

I didn’t need the monkey to tell me to turn back–my common sense had finally decided to make an appearance. However, while exploring around, I had again lost the trail. In fact, heading back to the car, I lost the trail a third time, and managed to get back to the car just as the sun started to set behind the hills.

I was a wreck, too — absolutely exhausted, badly overheated from the cold weather gear I was wearing, dehydrated because I hadn’t taken enough water, and barely able to walk after twisting about on the rocks. And I all I could think of was how hungry I was, and how I wanted some onion rings. Water, too. But I wanted onion rings. Yes, indeedy — deep fried, corn dipped onion rings, fresh out of the oil. I ended up stopping along the way, and bought some from a fast food place and wolfed them down. I then came home and promptly became sick.

After 24 hours of oranges and bananas and rest, I checked the hiking book again, actually reading the front matter this time, and found that though a hike in the book might be rated ‘easy’ this was the Sierra rating system, which is based on elevation and length of hike — not ground surface. You have to read the hike details to get a better idea of trail conditions. According to the details on Crane Lake, though the elevation change is slight, the trail itself is ‘rugged’ and often times, easy to lose because of the poor markings.

The author also mentioned in the front matter about avoiding hiking in conservation land during November and December, because of deer hunting season. I had totally forgotten that Missouri Conservation lands allow hunting, and sure enough, Sunday was right in the middle of hunting season. However, not Iron County, which was where I was hiking. No hunting was allowed at Crane Lake.

Well, no hunting, except for the feral hogs known to be in the area. Feral hogs. I’ll be damned.